/*
 * jQuery timepicker addon
 * By: Trent Richardson [http://trentrichardson.com]
 * Version 1.1.1
 * Last Modified: 11/07/2012
 *
 * Copyright 2012 Trent Richardson
 * You may use this project under MIT or GPL licenses.
 * http://trentrichardson.com/Impromptu/GPL-LICENSE.txt
 * http://trentrichardson.com/Impromptu/MIT-LICENSE.txt
 */

/*jslint evil: true, white: false, undef: false, nomen: false */

(function($) {

  /*
  * Lets not redefine timepicker, Prevent "Uncaught RangeError: Maximum call stack size exceeded"
  */
  $.ui.timepicker = $.ui.timepicker || {};
  if ($.ui.timepicker.version) {
    return;
  }

  /*
  * Extend jQueryUI, get it started with our version number
  */
  $.extend($.ui, {
    timepicker: {
      version: "1.1.1"
    }
  });

  /* 
  * Timepicker manager.
  * Use the singleton instance of this class, $.timepicker, to interact with the time picker.
  * Settings for (groups of) time pickers are maintained in an instance object,
  * allowing multiple different settings on the same page.
  */
  function Timepicker() {
    this.regional = []; // Available regional settings, indexed by language code
    this.regional[''] = { // Default regional settings
      currentText: 'Now',
      closeText: 'Done',
      amNames: ['AM', 'A'],
      pmNames: ['PM', 'P'],
      timeFormat: 'HH:mm',
      timeSuffix: '',
      timeOnlyTitle: 'Choose Time',
      timeText: 'Time',
      hourText: 'Hour',
      minuteText: 'Minute',
      secondText: 'Second',
      millisecText: 'Millisecond',
      timezoneText: 'Time Zone',
      isRTL: false
    };
    this._defaults = { // Global defaults for all the datetime picker instances
      showButtonPanel: true,
      timeOnly: false,
      showHour: true,
      showMinute: true,
      showSecond: false,
      showMillisec: false,
      showTimezone: false,
      showTime: true,
      stepHour: 1,
      stepMinute: 1,
      stepSecond: 1,
      stepMillisec: 1,
      hour: 0,
      minute: 0,
      second: 0,
      millisec: 0,
      timezone: null,
      useLocalTimezone: false,
      defaultTimezone: "+0000",
      hourMin: 0,
      minuteMin: 0,
      secondMin: 0,
      millisecMin: 0,
      hourMax: 23,
      minuteMax: 59,
      secondMax: 59,
      millisecMax: 999,
      minDateTime: null,
      maxDateTime: null,
      onSelect: null,
      hourGrid: 0,
      minuteGrid: 0,
      secondGrid: 0,
      millisecGrid: 0,
      alwaysSetTime: true,
      separator: ' ',
      altFieldTimeOnly: true,
      altTimeFormat: null,
      altSeparator: null,
      altTimeSuffix: null,
      pickerTimeFormat: null,
      pickerTimeSuffix: null,
      showTimepicker: true,
      timezoneIso8601: false,
      timezoneList: null,
      addSliderAccess: false,
      sliderAccessArgs: null,
      controlType: 'slider',
      defaultValue: null,
      parse: 'strict'
    };
    $.extend(this._defaults, this.regional['']);
  }

  $.extend(Timepicker.prototype, {
    $input: null,
    $altInput: null,
    $timeObj: null,
    inst: null,
    hour_slider: null,
    minute_slider: null,
    second_slider: null,
    millisec_slider: null,
    timezone_select: null,
    hour: 0,
    minute: 0,
    second: 0,
    millisec: 0,
    timezone: null,
    defaultTimezone: "+0000",
    hourMinOriginal: null,
    minuteMinOriginal: null,
    secondMinOriginal: null,
    millisecMinOriginal: null,
    hourMaxOriginal: null,
    minuteMaxOriginal: null,
    secondMaxOriginal: null,
    millisecMaxOriginal: null,
    ampm: '',
    formattedDate: '',
    formattedTime: '',
    formattedDateTime: '',
    timezoneList: null,
    units: ['hour','minute','second','millisec'],
    control: null,

    /* 
    * Override the default settings for all instances of the time picker.
    * @param  settings  object - the new settings to use as defaults (anonymous object)
    * @return the manager object
    */
    setDefaults: function(settings) {
      extendRemove(this._defaults, settings || {});
      return this;
    },

    /*
    * Create a new Timepicker instance
    */
    _newInst: function($input, o) {
      var tp_inst = new Timepicker(),
        inlineSettings = {},
                fns = {},
            overrides, i;

      for (var attrName in this._defaults) {
        if(this._defaults.hasOwnProperty(attrName)){
          var attrValue = $input.data(attrName.toLowerCase());
          if (attrValue) {
            try {
              inlineSettings[attrName] = eval(attrValue);
            } catch (err) {
              inlineSettings[attrName] = attrValue;
            }
          }
        }
      }
        overrides = {
            beforeShow: function (input, dp_inst) {
                if ($.isFunction(tp_inst._defaults.evnts.beforeShow)) {
                    return tp_inst._defaults.evnts.beforeShow.call($input[0], input, dp_inst, tp_inst);
                }
            },
            onChangeMonthYear: function (year, month, dp_inst) {
                // Update the time as well : this prevents the time from disappearing from the $input field.
                tp_inst._updateDateTime(dp_inst);
                if ($.isFunction(tp_inst._defaults.evnts.onChangeMonthYear)) {
                    tp_inst._defaults.evnts.onChangeMonthYear.call($input[0], year, month, dp_inst, tp_inst);
                }
            },
            onClose: function (dateText, dp_inst) {
                if (tp_inst.timeDefined === true && $input.val() !== '') {
                    tp_inst._updateDateTime(dp_inst);
                }
                if ($.isFunction(tp_inst._defaults.evnts.onClose)) {
                    tp_inst._defaults.evnts.onClose.call($input[0], dateText, dp_inst, tp_inst);
                }
            }
        };
        for (i in overrides) {
            if (overrides.hasOwnProperty(i)) {
                fns[i] = o[i] || null;
            }
        }
        tp_inst._defaults = $.extend({}, this._defaults, inlineSettings, o, overrides, {
            evnts:fns,
            timepicker: tp_inst // add timepicker as a property of datepicker: $.datepicker._get(dp_inst, 'timepicker');
        });
      tp_inst.amNames = $.map(tp_inst._defaults.amNames, function(val) {
        return val.toUpperCase();
      });
      tp_inst.pmNames = $.map(tp_inst._defaults.pmNames, function(val) {
        return val.toUpperCase();
      });

      // controlType is string - key to our this._controls
      if(typeof(tp_inst._defaults.controlType) === 'string'){
        if($.fn[tp_inst._defaults.controlType] === undefined){
          tp_inst._defaults.controlType = 'select';
        }
        tp_inst.control = tp_inst._controls[tp_inst._defaults.controlType];
      }
      // controlType is an object and must implement create, options, value methods
      else{ 
        tp_inst.control = tp_inst._defaults.controlType;
      }

      if (tp_inst._defaults.timezoneList === null) {
        var timezoneList = ['-1200', '-1100', '-1000', '-0930', '-0900', '-0800', '-0700', '-0600', '-0500', '-0430', '-0400', '-0330', '-0300', '-0200', '-0100', '+0000', 
                  '+0100', '+0200', '+0300', '+0330', '+0400', '+0430', '+0500', '+0530', '+0545', '+0600', '+0630', '+0700', '+0800', '+0845', '+0900', '+0930', 
                  '+1000', '+1030', '+1100', '+1130', '+1200', '+1245', '+1300', '+1400'];

        if (tp_inst._defaults.timezoneIso8601) {
          timezoneList = $.map(timezoneList, function(val) {
            return val == '+0000' ? 'Z' : (val.substring(0, 3) + ':' + val.substring(3));
          });
        }
        tp_inst._defaults.timezoneList = timezoneList;
      }

      tp_inst.timezone = tp_inst._defaults.timezone;
      tp_inst.hour = tp_inst._defaults.hour;
      tp_inst.minute = tp_inst._defaults.minute;
      tp_inst.second = tp_inst._defaults.second;
      tp_inst.millisec = tp_inst._defaults.millisec;
      tp_inst.ampm = '';
      tp_inst.$input = $input;

      if (o.altField) {
        tp_inst.$altInput = $(o.altField).css({
          cursor: 'pointer'
        }).focus(function() {
          $input.trigger("focus");
        });
      }

      if (tp_inst._defaults.minDate === 0 || tp_inst._defaults.minDateTime === 0) {
        tp_inst._defaults.minDate = new Date();
      }
      if (tp_inst._defaults.maxDate === 0 || tp_inst._defaults.maxDateTime === 0) {
        tp_inst._defaults.maxDate = new Date();
      }

      // datepicker needs minDate/maxDate, timepicker needs minDateTime/maxDateTime..
      if (tp_inst._defaults.minDate !== undefined && tp_inst._defaults.minDate instanceof Date) {
        tp_inst._defaults.minDateTime = new Date(tp_inst._defaults.minDate.getTime());
      }
      if (tp_inst._defaults.minDateTime !== undefined && tp_inst._defaults.minDateTime instanceof Date) {
        tp_inst._defaults.minDate = new Date(tp_inst._defaults.minDateTime.getTime());
      }
      if (tp_inst._defaults.maxDate !== undefined && tp_inst._defaults.maxDate instanceof Date) {
        tp_inst._defaults.maxDateTime = new Date(tp_inst._defaults.maxDate.getTime());
      }
      if (tp_inst._defaults.maxDateTime !== undefined && tp_inst._defaults.maxDateTime instanceof Date) {
        tp_inst._defaults.maxDate = new Date(tp_inst._defaults.maxDateTime.getTime());
      }
      tp_inst.$input.bind('focus', function() {
        tp_inst._onFocus();
      });

      return tp_inst;
    },

    /*
    * add our sliders to the calendar
    */
    _addTimePicker: function(dp_inst) {
      var currDT = (this.$altInput && this._defaults.altFieldTimeOnly) ? this.$input.val() + ' ' + this.$altInput.val() : this.$input.val();

      this.timeDefined = this._parseTime(currDT);
      this._limitMinMaxDateTime(dp_inst, false);
      this._injectTimePicker();
    },

    /*
    * parse the time string from input value or _setTime
    */
    _parseTime: function(timeString, withDate) {
      if (!this.inst) {
        this.inst = $.datepicker._getInst(this.$input[0]);
      }

      if (withDate || !this._defaults.timeOnly) {
        var dp_dateFormat = $.datepicker._get(this.inst, 'dateFormat');
        try {
          var parseRes = parseDateTimeInternal(dp_dateFormat, this._defaults.timeFormat, timeString, $.datepicker._getFormatConfig(this.inst), this._defaults);
          if (!parseRes.timeObj) {
            return false;
          }
          $.extend(this, parseRes.timeObj);
        } catch (err) {
          $.datepicker.log("Error parsing the date/time string: " + err +
                  "\ndate/time string = " + timeString +
                  "\ntimeFormat = " + this._defaults.timeFormat +
                  "\ndateFormat = " + dp_dateFormat);
          return false;
        }
        return true;
      } else {
        var timeObj = $.datepicker.parseTime(this._defaults.timeFormat, timeString, this._defaults);
        if (!timeObj) {
          return false;
        }
        $.extend(this, timeObj);
        return true;
      }
    },

    /*
    * generate and inject html for timepicker into ui datepicker
    */
    _injectTimePicker: function() {
      var $dp = this.inst.dpDiv,
        o = this.inst.settings,
        tp_inst = this,
        litem = '',
        uitem = '',
        max = {},
        gridSize = {},
        size = null;

      // Prevent displaying twice
      if ($dp.find("div.ui-timepicker-div").length === 0 && o.showTimepicker) {
        var noDisplay = ' style="display:none;"',
          html = '<div class="ui-timepicker-div'+ (o.isRTL? ' ui-timepicker-rtl' : '') +'"><dl>' + '<dt class="ui_tpicker_time_label"' + ((o.showTime) ? '' : noDisplay) + '>' + o.timeText + '</dt>' + 
                '<dd class="ui_tpicker_time"' + ((o.showTime) ? '' : noDisplay) + '></dd>';

        // Create the markup
        for(var i=0,l=this.units.length; i<l; i++){
          litem = this.units[i];
          uitem = litem.substr(0,1).toUpperCase() + litem.substr(1);
          // Added by Peter Medeiros:
          // - Figure out what the hour/minute/second max should be based on the step values.
          // - Example: if stepMinute is 15, then minMax is 45.
          max[litem] = parseInt((o[litem+'Max'] - ((o[litem+'Max'] - o[litem+'Min']) % o['step'+uitem])), 10);
          gridSize[litem] = 0;

          html += '<dt class="ui_tpicker_'+ litem +'_label"' + ((o['show'+uitem]) ? '' : noDisplay) + '>' + o[litem +'Text'] + '</dt>' + 
                '<dd class="ui_tpicker_'+ litem +'"><div class="ui_tpicker_'+ litem +'_slider"' + ((o['show'+uitem]) ? '' : noDisplay) + '></div>';

          if (o['show'+uitem] && o[litem+'Grid'] > 0) {
            html += '<div style="padding-left: 1px"><table class="ui-tpicker-grid-label"><tr>';

            if(litem == 'hour'){
              for (var h = o[litem+'Min']; h <= max[litem]; h += parseInt(o[litem+'Grid'], 10)) {
                gridSize[litem]++;
                var tmph = $.datepicker.formatTime(useAmpm(o.pickerTimeFormat || o.timeFormat)? 'hht':'HH', {hour:h}, o);                 
                html += '<td data-for="'+litem+'">' + tmph + '</td>';
              }
            }
            else{
              for (var m = o[litem+'Min']; m <= max[litem]; m += parseInt(o[litem+'Grid'], 10)) {
                gridSize[litem]++;
                html += '<td data-for="'+litem+'">' + ((m < 10) ? '0' : '') + m + '</td>';
              }
            }

            html += '</tr></table></div>';
          }
          html += '</dd>';
        }
        
        // Timezone
        html += '<dt class="ui_tpicker_timezone_label"' + ((o.showTimezone) ? '' : noDisplay) + '>' + o.timezoneText + '</dt>';
        html += '<dd class="ui_tpicker_timezone" ' + ((o.showTimezone) ? '' : noDisplay) + '></dd>';

        // Create the elements from string
        html += '</dl></div>';
        var $tp = $(html);

        // if we only want time picker...
        if (o.timeOnly === true) {
          $tp.prepend('<div class="ui-widget-header ui-helper-clearfix ui-corner-all">' + '<div class="ui-datepicker-title">' + o.timeOnlyTitle + '</div>' + '</div>');
          $dp.find('.ui-datepicker-header, .ui-datepicker-calendar').hide();
        }
        
        // add sliders, adjust grids, add events
        for(var i=0,l=tp_inst.units.length; i<l; i++){
          litem = tp_inst.units[i];
          uitem = litem.substr(0,1).toUpperCase() + litem.substr(1);
          
          // add the slider
          tp_inst[litem+'_slider'] = tp_inst.control.create(tp_inst, $tp.find('.ui_tpicker_'+litem+'_slider'), litem, tp_inst[litem], o[litem+'Min'], max[litem], o['step'+uitem]);

          // adjust the grid and add click event
          if (o['show'+uitem] && o[litem+'Grid'] > 0) {
            size = 100 * gridSize[litem] * o[litem+'Grid'] / (max[litem] - o[litem+'Min']);
            $tp.find('.ui_tpicker_'+litem+' table').css({
              width: size + "%",
              marginLeft: o.isRTL? '0' : ((size / (-2 * gridSize[litem])) + "%"),
              marginRight: o.isRTL? ((size / (-2 * gridSize[litem])) + "%") : '0',
              borderCollapse: 'collapse'
            }).find("td").click(function(e){
                var $t = $(this),
                  h = $t.html(),
                  n = parseInt(h.replace(/[^0-9]/g),10),
                  ap = h.replace(/[^apm]/ig),
                  f = $t.data('for'); // loses scope, so we use data-for

                if(f == 'hour'){
                  if(ap.indexOf('p') !== -1 && n < 12){
                    n += 12;
                  }
                  else{
                    if(ap.indexOf('a') !== -1 && n === 12){
                      n = 0;
                    }
                  }
                }
                
                tp_inst.control.value(tp_inst, tp_inst[f+'_slider'], litem, n);

                tp_inst._onTimeChange();
                tp_inst._onSelectHandler();
              })
            .css({
                cursor: 'pointer',
                width: (100 / gridSize[litem]) + '%',
                textAlign: 'center',
                overflow: 'hidden'
              });
          } // end if grid > 0
        } // end for loop

        // Add timezone options
        this.timezone_select = $tp.find('.ui_tpicker_timezone').append('<select></select>').find("select");
        $.fn.append.apply(this.timezone_select,
        $.map(o.timezoneList, function(val, idx) {
          return $("<option />").val(typeof val == "object" ? val.value : val).text(typeof val == "object" ? val.label : val);
        }));
        if (typeof(this.timezone) != "undefined" && this.timezone !== null && this.timezone !== "") {
          var local_date = new Date(this.inst.selectedYear, this.inst.selectedMonth, this.inst.selectedDay, 12);
          var local_timezone = $.timepicker.timeZoneOffsetString(local_date);
          if (local_timezone == this.timezone) {
            selectLocalTimeZone(tp_inst);
          } else {
            this.timezone_select.val(this.timezone);
          }
        } else {
          if (typeof(this.hour) != "undefined" && this.hour !== null && this.hour !== "") {
            this.timezone_select.val(o.defaultTimezone);
          } else {
            selectLocalTimeZone(tp_inst);
          }
        }
        this.timezone_select.change(function() {
          tp_inst._defaults.useLocalTimezone = false;
          tp_inst._onTimeChange();
        });
        // End timezone options
        
        // inject timepicker into datepicker
        var $buttonPanel = $dp.find('.ui-datepicker-buttonpane');
        if ($buttonPanel.length) {
          $buttonPanel.before($tp);
        } else {
          $dp.append($tp);
        }

        this.$timeObj = $tp.find('.ui_tpicker_time');

        if (this.inst !== null) {
          var timeDefined = this.timeDefined;
          this._onTimeChange();
          this.timeDefined = timeDefined;
        }

        // slideAccess integration: http://trentrichardson.com/2011/11/11/jquery-ui-sliders-and-touch-accessibility/
        if (this._defaults.addSliderAccess) {
          var sliderAccessArgs = this._defaults.sliderAccessArgs,
            rtl = this._defaults.isRTL;
          sliderAccessArgs.isRTL = rtl;
            
          setTimeout(function() { // fix for inline mode
            if ($tp.find('.ui-slider-access').length === 0) {
              $tp.find('.ui-slider:visible').sliderAccess(sliderAccessArgs);

              // fix any grids since sliders are shorter
              var sliderAccessWidth = $tp.find('.ui-slider-access:eq(0)').outerWidth(true);
              if (sliderAccessWidth) {
                $tp.find('table:visible').each(function() {
                  var $g = $(this),
                    oldWidth = $g.outerWidth(),
                    oldMarginLeft = $g.css(rtl? 'marginRight':'marginLeft').toString().replace('%', ''),
                    newWidth = oldWidth - sliderAccessWidth,
                    newMarginLeft = ((oldMarginLeft * newWidth) / oldWidth) + '%',
                    css = { width: newWidth, marginRight: 0, marginLeft: 0 };
                  css[rtl? 'marginRight':'marginLeft'] = newMarginLeft;
                  $g.css(css);
                });
              }
            }
          }, 10);
        }
        // end slideAccess integration

      }
    },

    /*
    * This function tries to limit the ability to go outside the
    * min/max date range
    */
    _limitMinMaxDateTime: function(dp_inst, adjustSliders) {
      var o = this._defaults,
        dp_date = new Date(dp_inst.selectedYear, dp_inst.selectedMonth, dp_inst.selectedDay);

      if (!this._defaults.showTimepicker) {
        return;
      } // No time so nothing to check here

      if ($.datepicker._get(dp_inst, 'minDateTime') !== null && $.datepicker._get(dp_inst, 'minDateTime') !== undefined && dp_date) {
        var minDateTime = $.datepicker._get(dp_inst, 'minDateTime'),
          minDateTimeDate = new Date(minDateTime.getFullYear(), minDateTime.getMonth(), minDateTime.getDate(), 0, 0, 0, 0);

        if (this.hourMinOriginal === null || this.minuteMinOriginal === null || this.secondMinOriginal === null || this.millisecMinOriginal === null) {
          this.hourMinOriginal = o.hourMin;
          this.minuteMinOriginal = o.minuteMin;
          this.secondMinOriginal = o.secondMin;
          this.millisecMinOriginal = o.millisecMin;
        }

        if (dp_inst.settings.timeOnly || minDateTimeDate.getTime() == dp_date.getTime()) {
          this._defaults.hourMin = minDateTime.getHours();
          if (this.hour <= this._defaults.hourMin) {
            this.hour = this._defaults.hourMin;
            this._defaults.minuteMin = minDateTime.getMinutes();
            if (this.minute <= this._defaults.minuteMin) {
              this.minute = this._defaults.minuteMin;
              this._defaults.secondMin = minDateTime.getSeconds();
              if (this.second <= this._defaults.secondMin) {
                this.second = this._defaults.secondMin;
                this._defaults.millisecMin = minDateTime.getMilliseconds();
              } else {
                if (this.millisec < this._defaults.millisecMin) {
                  this.millisec = this._defaults.millisecMin;
                }
                this._defaults.millisecMin = this.millisecMinOriginal;
              }
            } else {
              this._defaults.secondMin = this.secondMinOriginal;
              this._defaults.millisecMin = this.millisecMinOriginal;
            }
          } else {
            this._defaults.minuteMin = this.minuteMinOriginal;
            this._defaults.secondMin = this.secondMinOriginal;
            this._defaults.millisecMin = this.millisecMinOriginal;
          }
        } else {
          this._defaults.hourMin = this.hourMinOriginal;
          this._defaults.minuteMin = this.minuteMinOriginal;
          this._defaults.secondMin = this.secondMinOriginal;
          this._defaults.millisecMin = this.millisecMinOriginal;
        }
      }

      if ($.datepicker._get(dp_inst, 'maxDateTime') !== null && $.datepicker._get(dp_inst, 'maxDateTime') !== undefined && dp_date) {
        var maxDateTime = $.datepicker._get(dp_inst, 'maxDateTime'),
          maxDateTimeDate = new Date(maxDateTime.getFullYear(), maxDateTime.getMonth(), maxDateTime.getDate(), 0, 0, 0, 0);

        if (this.hourMaxOriginal === null || this.minuteMaxOriginal === null || this.secondMaxOriginal === null) {
          this.hourMaxOriginal = o.hourMax;
          this.minuteMaxOriginal = o.minuteMax;
          this.secondMaxOriginal = o.secondMax;
          this.millisecMaxOriginal = o.millisecMax;
        }

        if (dp_inst.settings.timeOnly || maxDateTimeDate.getTime() == dp_date.getTime()) {
          this._defaults.hourMax = maxDateTime.getHours();
          if (this.hour >= this._defaults.hourMax) {
            this.hour = this._defaults.hourMax;
            this._defaults.minuteMax = maxDateTime.getMinutes();
            if (this.minute >= this._defaults.minuteMax) {
              this.minute = this._defaults.minuteMax;
              this._defaults.secondMax = maxDateTime.getSeconds();
            } else if (this.second >= this._defaults.secondMax) {
              this.second = this._defaults.secondMax;
              this._defaults.millisecMax = maxDateTime.getMilliseconds();
            } else {
              if (this.millisec > this._defaults.millisecMax) {
                this.millisec = this._defaults.millisecMax;
              }
              this._defaults.millisecMax = this.millisecMaxOriginal;
            }
          } else {
            this._defaults.minuteMax = this.minuteMaxOriginal;
            this._defaults.secondMax = this.secondMaxOriginal;
            this._defaults.millisecMax = this.millisecMaxOriginal;
          }
        } else {
          this._defaults.hourMax = this.hourMaxOriginal;
          this._defaults.minuteMax = this.minuteMaxOriginal;
          this._defaults.secondMax = this.secondMaxOriginal;
          this._defaults.millisecMax = this.millisecMaxOriginal;
        }
      }

      if (adjustSliders !== undefined && adjustSliders === true) {
        var hourMax = parseInt((this._defaults.hourMax - ((this._defaults.hourMax - this._defaults.hourMin) % this._defaults.stepHour)), 10),
          minMax = parseInt((this._defaults.minuteMax - ((this._defaults.minuteMax - this._defaults.minuteMin) % this._defaults.stepMinute)), 10),
          secMax = parseInt((this._defaults.secondMax - ((this._defaults.secondMax - this._defaults.secondMin) % this._defaults.stepSecond)), 10),
          millisecMax = parseInt((this._defaults.millisecMax - ((this._defaults.millisecMax - this._defaults.millisecMin) % this._defaults.stepMillisec)), 10);

        if (this.hour_slider) {
          this.control.options(this, this.hour_slider, 'hour', { min: this._defaults.hourMin, max: hourMax });
          this.control.value(this, this.hour_slider, 'hour', this.hour - this.hour % this._defaults.stepHour);
        }
        if (this.minute_slider) {
          this.control.options(this, this.minute_slider, 'minute', { min: this._defaults.minuteMin, max: minMax });
          this.control.value(this, this.minute_slider, 'minute', this.minute - this.minute % this._defaults.stepMinute);
        }
        if (this.second_slider) {
          this.control.options(this, this.second_slider, 'second', { min: this._defaults.secondMin, max: secMax });
          this.control.value(this, this.second_slider, 'second', this.second - this.second % this._defaults.stepSecond);
        }
        if (this.millisec_slider) {
          this.control.options(this, this.millisec_slider, 'millisec', { min: this._defaults.millisecMin, max: millisecMax });
          this.control.value(this, this.millisec_slider, 'millisec', this.millisec - this.millisec % this._defaults.stepMillisec);
        }
      }

    },

    /*
    * when a slider moves, set the internal time...
    * on time change is also called when the time is updated in the text field
    */
    _onTimeChange: function() {
      var hour = (this.hour_slider) ? this.control.value(this, this.hour_slider, 'hour') : false,
        minute = (this.minute_slider) ? this.control.value(this, this.minute_slider, 'minute') : false,
        second = (this.second_slider) ? this.control.value(this, this.second_slider, 'second') : false,
        millisec = (this.millisec_slider) ? this.control.value(this, this.millisec_slider, 'millisec') : false,
        timezone = (this.timezone_select) ? this.timezone_select.val() : false,
        o = this._defaults,
        pickerTimeFormat = o.pickerTimeFormat || o.timeFormat,
        pickerTimeSuffix = o.pickerTimeSuffix || o.timeSuffix;

      if (typeof(hour) == 'object') {
        hour = false;
      }
      if (typeof(minute) == 'object') {
        minute = false;
      }
      if (typeof(second) == 'object') {
        second = false;
      }
      if (typeof(millisec) == 'object') {
        millisec = false;
      }
      if (typeof(timezone) == 'object') {
        timezone = false;
      }

      if (hour !== false) {
        hour = parseInt(hour, 10);
      }
      if (minute !== false) {
        minute = parseInt(minute, 10);
      }
      if (second !== false) {
        second = parseInt(second, 10);
      }
      if (millisec !== false) {
        millisec = parseInt(millisec, 10);
      }

      var ampm = o[hour < 12 ? 'amNames' : 'pmNames'][0];

      // If the update was done in the input field, the input field should not be updated.
      // If the update was done using the sliders, update the input field.
      var hasChanged = (hour != this.hour || minute != this.minute || second != this.second || millisec != this.millisec 
                || (this.ampm.length > 0 && (hour < 12) != ($.inArray(this.ampm.toUpperCase(), this.amNames) !== -1)) 
                || ((this.timezone === null && timezone != this.defaultTimezone) || (this.timezone !== null && timezone != this.timezone)));

      if (hasChanged) {

        if (hour !== false) {
          this.hour = hour;
        }
        if (minute !== false) {
          this.minute = minute;
        }
        if (second !== false) {
          this.second = second;
        }
        if (millisec !== false) {
          this.millisec = millisec;
        }
        if (timezone !== false) {
          this.timezone = timezone;
        }

        if (!this.inst) {
          this.inst = $.datepicker._getInst(this.$input[0]);
        }

        this._limitMinMaxDateTime(this.inst, true);
      }
      if (useAmpm(o.timeFormat)) {
        this.ampm = ampm;
      }

      // Updates the time within the timepicker
      this.formattedTime = $.datepicker.formatTime(o.timeFormat, this, o);
      if (this.$timeObj) {
        if(pickerTimeFormat === o.timeFormat){
          this.$timeObj.text(this.formattedTime + pickerTimeSuffix);
        }
        else{
          this.$timeObj.text($.datepicker.formatTime(pickerTimeFormat, this, o) + pickerTimeSuffix);
        }
      }

      this.timeDefined = true;
      if (hasChanged) {
        this._updateDateTime();
      }
    },

    /*
    * call custom onSelect.
    * bind to sliders slidestop, and grid click.
    */
    _onSelectHandler: function() {
      var onSelect = this._defaults.onSelect || this.inst.settings.onSelect;
      var inputEl = this.$input ? this.$input[0] : null;
      if (onSelect && inputEl) {
        onSelect.apply(inputEl, [this.formattedDateTime, this]);
      }
    },

    /*
    * update our input with the new date time..
    */
    _updateDateTime: function(dp_inst) {
      dp_inst = this.inst || dp_inst;
      var dt = $.datepicker._daylightSavingAdjust(new Date(dp_inst.selectedYear, dp_inst.selectedMonth, dp_inst.selectedDay)),
        dateFmt = $.datepicker._get(dp_inst, 'dateFormat'),
        formatCfg = $.datepicker._getFormatConfig(dp_inst),
        timeAvailable = dt !== null && this.timeDefined;
      this.formattedDate = $.datepicker.formatDate(dateFmt, (dt === null ? new Date() : dt), formatCfg);
      var formattedDateTime = this.formattedDate;

      /*
      * remove following lines to force every changes in date picker to change the input value
      * Bug descriptions: when an input field has a default value, and click on the field to pop up the date picker. 
      * If the user manually empty the value in the input field, the date picker will never change selected value.
      */
      //if (dp_inst.lastVal !== undefined && (dp_inst.lastVal.length > 0 && this.$input.val().length === 0)) {
      //  return;
      //}

      if (this._defaults.timeOnly === true) {
        formattedDateTime = this.formattedTime;
      } else if (this._defaults.timeOnly !== true && (this._defaults.alwaysSetTime || timeAvailable)) {
        formattedDateTime += this._defaults.separator + this.formattedTime + this._defaults.timeSuffix;
      }

      this.formattedDateTime = formattedDateTime;

      if (!this._defaults.showTimepicker) {
        this.$input.val(this.formattedDate);
      } else if (this.$altInput && this._defaults.altFieldTimeOnly === true) {
        this.$altInput.val(this.formattedTime);
        this.$input.val(this.formattedDate);
      } else if (this.$altInput) {
        this.$input.val(formattedDateTime);
        var altFormattedDateTime = '',
          altSeparator = this._defaults.altSeparator ? this._defaults.altSeparator : this._defaults.separator,
          altTimeSuffix = this._defaults.altTimeSuffix ? this._defaults.altTimeSuffix : this._defaults.timeSuffix;

        if (this._defaults.altFormat) altFormattedDateTime = $.datepicker.formatDate(this._defaults.altFormat, (dt === null ? new Date() : dt), formatCfg);
        else altFormattedDateTime = this.formattedDate;
        if (altFormattedDateTime) altFormattedDateTime += altSeparator;
        if (this._defaults.altTimeFormat) altFormattedDateTime += $.datepicker.formatTime(this._defaults.altTimeFormat, this, this._defaults) + altTimeSuffix;
        else altFormattedDateTime += this.formattedTime + altTimeSuffix;
        this.$altInput.val(altFormattedDateTime);
      } else {
        this.$input.val(formattedDateTime);
      }

      this.$input.trigger("change");
    },

    _onFocus: function() {
      if (!this.$input.val() && this._defaults.defaultValue) {
        this.$input.val(this._defaults.defaultValue);
        var inst = $.datepicker._getInst(this.$input.get(0)),
          tp_inst = $.datepicker._get(inst, 'timepicker');
        if (tp_inst) {
          if (tp_inst._defaults.timeOnly && (inst.input.val() != inst.lastVal)) {
            try {
              $.datepicker._updateDatepicker(inst);
            } catch (err) {
              $.datepicker.log(err);
            }
          }
        }
      }
    },

    /*
    * Small abstraction to control types
    * We can add more, just be sure to follow the pattern: create, options, value
    */
    _controls: {
      // slider methods
      slider: {
        create: function(tp_inst, obj, unit, val, min, max, step){
          var rtl = tp_inst._defaults.isRTL; // if rtl go -60->0 instead of 0->60
          return obj.prop('slide', null).slider({
            orientation: "horizontal",
            value: rtl? val*-1 : val,
            min: rtl? max*-1 : min,
            max: rtl? min*-1 : max,
            step: step,
            slide: function(event, ui) {
              tp_inst.control.value(tp_inst, $(this), unit, rtl? ui.value*-1:ui.value);
              tp_inst._onTimeChange();
            },
            stop: function(event, ui) {
              tp_inst._onSelectHandler();
            }
          }); 
        },
        options: function(tp_inst, obj, unit, opts, val){
          if(tp_inst._defaults.isRTL){
            if(typeof(opts) == 'string'){
              if(opts == 'min' || opts == 'max'){
                if(val !== undefined)
                  return obj.slider(opts, val*-1);
                return Math.abs(obj.slider(opts));
              }
              return obj.slider(opts);
            }
            var min = opts.min, 
              max = opts.max;
            opts.min = opts.max = null;
            if(min !== undefined)
              opts.max = min * -1;
            if(max !== undefined)
              opts.min = max * -1;
            return obj.slider(opts);
          }
          if(typeof(opts) == 'string' && val !== undefined)
              return obj.slider(opts, val);
          return obj.slider(opts);
        },
        value: function(tp_inst, obj, unit, val){
          if(tp_inst._defaults.isRTL){
            if(val !== undefined)
              return obj.slider('value', val*-1);
            return Math.abs(obj.slider('value'));
          }
          if(val !== undefined)
            return obj.slider('value', val);
          return obj.slider('value');
        }
      },
      // select methods
      select: {
        create: function(tp_inst, obj, unit, val, min, max, step){
          var sel = '<select class="ui-timepicker-select" data-unit="'+ unit +'" data-min="'+ min +'" data-max="'+ max +'" data-step="'+ step +'">',
            ul = tp_inst._defaults.timeFormat.indexOf('t') !== -1? 'toLowerCase':'toUpperCase',
            m = 0;

          for(var i=min; i<=max; i+=step){            
            sel += '<option value="'+ i +'"'+ (i==val? ' selected':'') +'>';
            if(unit == 'hour' && useAmpm(tp_inst._defaults.pickerTimeFormat || tp_inst._defaults.timeFormat))
              sel += $.datepicker.formatTime("hh TT", {hour:i}, tp_inst._defaults);
            else if(unit == 'millisec' || i >= 10) sel += i;
            else sel += '0'+ i.toString();
            sel += '</option>';
          }
          sel += '</select>';

          obj.children('select').remove();

          $(sel).appendTo(obj).change(function(e){
            tp_inst._onTimeChange();
            tp_inst._onSelectHandler();
          });

          return obj;
        },
        options: function(tp_inst, obj, unit, opts, val){
          var o = {},
            $t = obj.children('select');
          if(typeof(opts) == 'string'){
            if(val === undefined)
              return $t.data(opts);
            o[opts] = val;  
          }
          else o = opts;
          return tp_inst.control.create(tp_inst, obj, $t.data('unit'), $t.val(), o.min || $t.data('min'), o.max || $t.data('max'), o.step || $t.data('step'));
        },
        value: function(tp_inst, obj, unit, val){
          var $t = obj.children('select');
          if(val !== undefined)
            return $t.val(val);
          return $t.val();
        }
      }
    } // end _controls

  });

  $.fn.extend({
    /*
    * shorthand just to use timepicker..
    */
    timepicker: function(o) {
      o = o || {};
      var tmp_args = Array.prototype.slice.call(arguments);

      if (typeof o == 'object') {
        tmp_args[0] = $.extend(o, {
          timeOnly: true
        });
      }

      return $(this).each(function() {
        $.fn.datetimepicker.apply($(this), tmp_args);
      });
    },

    /*
    * extend timepicker to datepicker
    */
    datetimepicker: function(o) {
      o = o || {};
      var tmp_args = arguments;

      if (typeof(o) == 'string') {
        if (o == 'getDate') {
          return $.fn.datepicker.apply($(this[0]), tmp_args);
        } else {
          return this.each(function() {
            var $t = $(this);
            $t.datepicker.apply($t, tmp_args);
          });
        }
      } else {
        return this.each(function() {
          var $t = $(this);
          $t.datepicker($.timepicker._newInst($t, o)._defaults);
        });
      }
    }
  });

  /*
  * Public Utility to parse date and time
  */
  $.datepicker.parseDateTime = function(dateFormat, timeFormat, dateTimeString, dateSettings, timeSettings) {
    var parseRes = parseDateTimeInternal(dateFormat, timeFormat, dateTimeString, dateSettings, timeSettings);
    if (parseRes.timeObj) {
      var t = parseRes.timeObj;
      parseRes.date.setHours(t.hour, t.minute, t.second, t.millisec);
    }

    return parseRes.date;
  };

  /*
  * Public utility to parse time
  */
  $.datepicker.parseTime = function(timeFormat, timeString, options) {    
    var o = extendRemove(extendRemove({}, $.timepicker._defaults), options || {});

    // Strict parse requires the timeString to match the timeFormat exactly
    var strictParse = function(f, s, o){

      // pattern for standard and localized AM/PM markers
      var getPatternAmpm = function(amNames, pmNames) {
        var markers = [];
        if (amNames) {
          $.merge(markers, amNames);
        }
        if (pmNames) {
          $.merge(markers, pmNames);
        }
        markers = $.map(markers, function(val) {
          return val.replace(/[.*+?|()\[\]{}\\]/g, '\\$&');
        });
        return '(' + markers.join('|') + ')?';
      };

      // figure out position of time elements.. cause js cant do named captures
      var getFormatPositions = function(timeFormat) {
        var finds = timeFormat.toLowerCase().match(/(h{1,2}|m{1,2}|s{1,2}|l{1}|t{1,2}|z|'.*?')/g),
          orders = {
            h: -1,
            m: -1,
            s: -1,
            l: -1,
            t: -1,
            z: -1
          };

        if (finds) {
          for (var i = 0; i < finds.length; i++) {
            if (orders[finds[i].toString().charAt(0)] == -1) {
              orders[finds[i].toString().charAt(0)] = i + 1;
            }
          }
        }
        return orders;
      };

      var regstr = '^' + f.toString()
          .replace(/([hH]{1,2}|mm?|ss?|[tT]{1,2}|[lz]|'.*?')/g, function (match) {
              switch (match.charAt(0).toLowerCase()) {
                case 'h': return '(\\d?\\d)';
                case 'm': return '(\\d?\\d)';
                case 's': return '(\\d?\\d)';
                case 'l': return '(\\d?\\d?\\d)';
                case 'z': return '(z|[-+]\\d\\d:?\\d\\d|\\S+)?';
                case 't': return getPatternAmpm(o.amNames, o.pmNames);
                default:    // literal escaped in quotes
                  return '(' + match.replace(/\'/g, "").replace(/(\.|\$|\^|\\|\/|\(|\)|\[|\]|\?|\+|\*)/g, function (m) { return "\\" + m; }) + ')?';
              }
            })
          .replace(/\s/g, '\\s?') +
          o.timeSuffix + '$',
        order = getFormatPositions(f),
        ampm = '',
        treg;

      treg = s.match(new RegExp(regstr, 'i'));

      var resTime = {
        hour: 0,
        minute: 0,
        second: 0,
        millisec: 0
      };

      if (treg) {
        if (order.t !== -1) {
          if (treg[order.t] === undefined || treg[order.t].length === 0) {
            ampm = '';
            resTime.ampm = '';
          } else {
            ampm = $.inArray(treg[order.t].toUpperCase(), o.amNames) !== -1 ? 'AM' : 'PM';
            resTime.ampm = o[ampm == 'AM' ? 'amNames' : 'pmNames'][0];
          }
        }

        if (order.h !== -1) {
          if (ampm == 'AM' && treg[order.h] == '12') {
            resTime.hour = 0; // 12am = 0 hour
          } else {
            if (ampm == 'PM' && treg[order.h] != '12') {
              resTime.hour = parseInt(treg[order.h], 10) + 12; // 12pm = 12 hour, any other pm = hour + 12
            } else {
              resTime.hour = Number(treg[order.h]);
            }
          }
        }

        if (order.m !== -1) {
          resTime.minute = Number(treg[order.m]);
        }
        if (order.s !== -1) {
          resTime.second = Number(treg[order.s]);
        }
        if (order.l !== -1) {
          resTime.millisec = Number(treg[order.l]);
        }
        if (order.z !== -1 && treg[order.z] !== undefined) {
          var tz = treg[order.z].toUpperCase();
          switch (tz.length) {
          case 1:
            // Z
            tz = o.timezoneIso8601 ? 'Z' : '+0000';
            break;
          case 5:
            // +hhmm
            if (o.timezoneIso8601) {
              tz = tz.substring(1) == '0000' ? 'Z' : tz.substring(0, 3) + ':' + tz.substring(3);
            }
            break;
          case 6:
            // +hh:mm
            if (!o.timezoneIso8601) {
              tz = tz == 'Z' || tz.substring(1) == '00:00' ? '+0000' : tz.replace(/:/, '');
            } else {
              if (tz.substring(1) == '00:00') {
                tz = 'Z';
              }
            }
            break;
          }
          resTime.timezone = tz;
        }


        return resTime;
      }
      return false;
    };// end strictParse

    // First try JS Date, if that fails, use strictParse
    var looseParse = function(f,s,o){
      try{
        var d = new Date('2012-01-01 '+ s);
        return {
          hour: d.getHours(),
          minutes: d.getMinutes(),
          seconds: d.getSeconds(),
          millisec: d.getMilliseconds(),
          timezone: $.timepicker.timeZoneOffsetString(d)
        };
      }
      catch(err){
        try{
          return strictParse(f,s,o);
        }
        catch(err2){
          $.datepicker.log("Unable to parse \ntimeString: "+ s +"\ntimeFormat: "+ f);
        }       
      }
      return false;
    }; // end looseParse
    
    if(typeof o.parse === "function"){
      return o.parse(timeFormat, timeString, o)
    }
    if(o.parse === 'loose'){
      return looseParse(timeFormat, timeString, o);
    }
    return strictParse(timeFormat, timeString, o);
  };

  /*
  * Public utility to format the time
  * format = string format of the time
  * time = a {}, not a Date() for timezones
  * options = essentially the regional[].. amNames, pmNames, ampm
  */
  $.datepicker.formatTime = function(format, time, options) {
    options = options || {};
    options = $.extend({}, $.timepicker._defaults, options);
    time = $.extend({
      hour: 0,
      minute: 0,
      second: 0,
      millisec: 0,
      timezone: '+0000'
    }, time);

    var tmptime = format,
      ampmName = options.amNames[0],
      hour = parseInt(time.hour, 10);

    if (hour > 11) {
      ampmName = options.pmNames[0];
    }

    tmptime = tmptime.replace(/(?:HH?|hh?|mm?|ss?|[tT]{1,2}|[lz]|('.*?'|".*?"))/g, function(match) {
    switch (match) {
      case 'HH':
        return ('0' + hour).slice(-2);
      case 'H':
        return hour;
      case 'hh':
        return ('0' + convert24to12(hour)).slice(-2);
      case 'h':
        return convert24to12(hour);
      case 'mm':
        return ('0' + time.minute).slice(-2);
      case 'm':
        return time.minute;
      case 'ss':
        return ('0' + time.second).slice(-2);
      case 's':
        return time.second;
      case 'l':
        return ('00' + time.millisec).slice(-3);
      case 'z':
        return time.timezone === null? options.defaultTimezone : time.timezone;
      case 'T': 
        return ampmName.charAt(0).toUpperCase();
      case 'TT': 
        return ampmName.toUpperCase();
      case 't':
        return ampmName.charAt(0).toLowerCase();
      case 'tt':
        return ampmName.toLowerCase();
      default:
        return match.replace(/\'/g, "") || "'";
      }
    });

    tmptime = $.trim(tmptime);
    return tmptime;
  };

  /*
  * the bad hack :/ override datepicker so it doesnt close on select
  // inspired: http://stackoverflow.com/questions/1252512/jquery-datepicker-prevent-closing-picker-when-clicking-a-date/1762378#1762378
  */
  $.datepicker._base_selectDate = $.datepicker._selectDate;
  $.datepicker._selectDate = function(id, dateStr) {
    var inst = this._getInst($(id)[0]),
      tp_inst = this._get(inst, 'timepicker');

    if (tp_inst) {
      tp_inst._limitMinMaxDateTime(inst, true);
      inst.inline = inst.stay_open = true;
      //This way the onSelect handler called from calendarpicker get the full dateTime
      this._base_selectDate(id, dateStr);
      inst.inline = inst.stay_open = false;
      this._notifyChange(inst);
      this._updateDatepicker(inst);
    } else {
      this._base_selectDate(id, dateStr);
    }
  };

  /*
  * second bad hack :/ override datepicker so it triggers an event when changing the input field
  * and does not redraw the datepicker on every selectDate event
  */
  $.datepicker._base_updateDatepicker = $.datepicker._updateDatepicker;
  $.datepicker._updateDatepicker = function(inst) {

    // don't popup the datepicker if there is another instance already opened
    var input = inst.input[0];
    if ($.datepicker._curInst && $.datepicker._curInst != inst && $.datepicker._datepickerShowing && $.datepicker._lastInput != input) {
      return;
    }

    if (typeof(inst.stay_open) !== 'boolean' || inst.stay_open === false) {

      this._base_updateDatepicker(inst);

      // Reload the time control when changing something in the input text field.
      var tp_inst = this._get(inst, 'timepicker');
      if (tp_inst) {
        tp_inst._addTimePicker(inst);

        if (tp_inst._defaults.useLocalTimezone) { //checks daylight saving with the new date.
          var date = new Date(inst.selectedYear, inst.selectedMonth, inst.selectedDay, 12);
          selectLocalTimeZone(tp_inst, date);
          tp_inst._onTimeChange();
        }
      }
    }
  };

  /*
  * third bad hack :/ override datepicker so it allows spaces and colon in the input field
  */
  $.datepicker._base_doKeyPress = $.datepicker._doKeyPress;
  $.datepicker._doKeyPress = function(event) {
    var inst = $.datepicker._getInst(event.target),
      tp_inst = $.datepicker._get(inst, 'timepicker');

    if (tp_inst) {
      if ($.datepicker._get(inst, 'constrainInput')) {
        var ampm = useAmpm(tp_inst._defaults.timeFormat),
          dateChars = $.datepicker._possibleChars($.datepicker._get(inst, 'dateFormat')),
          datetimeChars = tp_inst._defaults.timeFormat.toString()
                      .replace(/[hms]/g, '')
                      .replace(/TT/g, ampm ? 'APM' : '')
                      .replace(/Tt/g, ampm ? 'AaPpMm' : '')
                      .replace(/tT/g, ampm ? 'AaPpMm' : '')
                      .replace(/T/g, ampm ? 'AP' : '')
                      .replace(/tt/g, ampm ? 'apm' : '')
                      .replace(/t/g, ampm ? 'ap' : '') + 
                      " " + tp_inst._defaults.separator + 
                      tp_inst._defaults.timeSuffix + 
                      (tp_inst._defaults.showTimezone ? tp_inst._defaults.timezoneList.join('') : '') + 
                      (tp_inst._defaults.amNames.join('')) + (tp_inst._defaults.pmNames.join('')) + 
                      dateChars,
          chr = String.fromCharCode(event.charCode === undefined ? event.keyCode : event.charCode);
        return event.ctrlKey || (chr < ' ' || !dateChars || datetimeChars.indexOf(chr) > -1);
      }
    }

    return $.datepicker._base_doKeyPress(event);
  };

  /*
  * Fourth bad hack :/ override _updateAlternate function used in inline mode to init altField
  */
  $.datepicker._base_updateAlternate = $.datepicker._updateAlternate;
  /* Update any alternate field to synchronise with the main field. */
  $.datepicker._updateAlternate = function(inst) {
    var tp_inst = this._get(inst, 'timepicker');
    if(tp_inst){
      var altField = tp_inst._defaults.altField;
      if (altField) { // update alternate field too
        var altFormat = tp_inst._defaults.altFormat || tp_inst._defaults.dateFormat,
          date = this._getDate(inst),
          formatCfg = $.datepicker._getFormatConfig(inst),
          altFormattedDateTime = '', 
          altSeparator = tp_inst._defaults.altSeparator ? tp_inst._defaults.altSeparator : tp_inst._defaults.separator, 
          altTimeSuffix = tp_inst._defaults.altTimeSuffix ? tp_inst._defaults.altTimeSuffix : tp_inst._defaults.timeSuffix,
          altTimeFormat = tp_inst._defaults.altTimeFormat !== null ? tp_inst._defaults.altTimeFormat : tp_inst._defaults.timeFormat;
        
        altFormattedDateTime += $.datepicker.formatTime(altTimeFormat, tp_inst, tp_inst._defaults) + altTimeSuffix;
        if(!tp_inst._defaults.timeOnly && !tp_inst._defaults.altFieldTimeOnly){
          if(tp_inst._defaults.altFormat)
            altFormattedDateTime = $.datepicker.formatDate(tp_inst._defaults.altFormat, (date === null ? new Date() : date), formatCfg) + altSeparator + altFormattedDateTime;
          else altFormattedDateTime = tp_inst.formattedDate + altSeparator + altFormattedDateTime;
        }
        $(altField).val(altFormattedDateTime);
      }
    }
    else{
      $.datepicker._base_updateAlternate(inst);
    }
  };

  /*
  * Override key up event to sync manual input changes.
  */
  $.datepicker._base_doKeyUp = $.datepicker._doKeyUp;
  $.datepicker._doKeyUp = function(event) {
    var inst = $.datepicker._getInst(event.target),
      tp_inst = $.datepicker._get(inst, 'timepicker');

    if (tp_inst) {
      if (tp_inst._defaults.timeOnly && (inst.input.val() != inst.lastVal)) {
        try {
          $.datepicker._updateDatepicker(inst);
        } catch (err) {
          $.datepicker.log(err);
        }
      }
    }

    return $.datepicker._base_doKeyUp(event);
  };

  /*
  * override "Today" button to also grab the time.
  */
  $.datepicker._base_gotoToday = $.datepicker._gotoToday;
  $.datepicker._gotoToday = function(id) {
    var inst = this._getInst($(id)[0]),
      $dp = inst.dpDiv;
    this._base_gotoToday(id);
    var tp_inst = this._get(inst, 'timepicker');
    selectLocalTimeZone(tp_inst);
    var now = new Date();
    this._setTime(inst, now);
    $('.ui-datepicker-today', $dp).click();
  };

  /*
  * Disable & enable the Time in the datetimepicker
  */
  $.datepicker._disableTimepickerDatepicker = function(target) {
    var inst = this._getInst(target);
    if (!inst) {
      return;
    }

    var tp_inst = this._get(inst, 'timepicker');
    $(target).datepicker('getDate'); // Init selected[Year|Month|Day]
    if (tp_inst) {
      tp_inst._defaults.showTimepicker = false;
      tp_inst._updateDateTime(inst);
    }
  };

  $.datepicker._enableTimepickerDatepicker = function(target) {
    var inst = this._getInst(target);
    if (!inst) {
      return;
    }

    var tp_inst = this._get(inst, 'timepicker');
    $(target).datepicker('getDate'); // Init selected[Year|Month|Day]
    if (tp_inst) {
      tp_inst._defaults.showTimepicker = true;
      tp_inst._addTimePicker(inst); // Could be disabled on page load
      tp_inst._updateDateTime(inst);
    }
  };

  /*
  * Create our own set time function
  */
  $.datepicker._setTime = function(inst, date) {
    var tp_inst = this._get(inst, 'timepicker');
    if (tp_inst) {
      var defaults = tp_inst._defaults;

      // calling _setTime with no date sets time to defaults
      tp_inst.hour = date ? date.getHours() : defaults.hour;
      tp_inst.minute = date ? date.getMinutes() : defaults.minute;
      tp_inst.second = date ? date.getSeconds() : defaults.second;
      tp_inst.millisec = date ? date.getMilliseconds() : defaults.millisec;

      //check if within min/max times.. 
      tp_inst._limitMinMaxDateTime(inst, true);

      tp_inst._onTimeChange();
      tp_inst._updateDateTime(inst);
    }
  };

  /*
  * Create new public method to set only time, callable as $().datepicker('setTime', date)
  */
  $.datepicker._setTimeDatepicker = function(target, date, withDate) {
    var inst = this._getInst(target);
    if (!inst) {
      return;
    }

    var tp_inst = this._get(inst, 'timepicker');

    if (tp_inst) {
      this._setDateFromField(inst);
      var tp_date;
      if (date) {
        if (typeof date == "string") {
          tp_inst._parseTime(date, withDate);
          tp_date = new Date();
          tp_date.setHours(tp_inst.hour, tp_inst.minute, tp_inst.second, tp_inst.millisec);
        } else {
          tp_date = new Date(date.getTime());
        }
        if (tp_date.toString() == 'Invalid Date') {
          tp_date = undefined;
        }
        this._setTime(inst, tp_date);
      }
    }

  };

  /*
  * override setDate() to allow setting time too within Date object
  */
  $.datepicker._base_setDateDatepicker = $.datepicker._setDateDatepicker;
  $.datepicker._setDateDatepicker = function(target, date) {
    var inst = this._getInst(target);
    if (!inst) {
      return;
    }

    var tp_date = (date instanceof Date) ? new Date(date.getTime()) : date;

    this._updateDatepicker(inst);
    this._base_setDateDatepicker.apply(this, arguments);
    this._setTimeDatepicker(target, tp_date, true);
  };

  /*
  * override getDate() to allow getting time too within Date object
  */
  $.datepicker._base_getDateDatepicker = $.datepicker._getDateDatepicker;
  $.datepicker._getDateDatepicker = function(target, noDefault) {
    var inst = this._getInst(target);
    if (!inst) {
      return;
    }

    var tp_inst = this._get(inst, 'timepicker');

    if (tp_inst) {
      // if it hasn't yet been defined, grab from field
      if(inst.lastVal === undefined){
        this._setDateFromField(inst, noDefault);
      }

      var date = this._getDate(inst);
      if (date && tp_inst._parseTime($(target).val(), tp_inst.timeOnly)) {
        date.setHours(tp_inst.hour, tp_inst.minute, tp_inst.second, tp_inst.millisec);
      }
      return date;
    }
    return this._base_getDateDatepicker(target, noDefault);
  };

  /*
  * override parseDate() because UI 1.8.14 throws an error about "Extra characters"
  * An option in datapicker to ignore extra format characters would be nicer.
  */
  $.datepicker._base_parseDate = $.datepicker.parseDate;
  $.datepicker.parseDate = function(format, value, settings) {
    var date;
    try {
      date = this._base_parseDate(format, value, settings);
    } catch (err) {
      // Hack!  The error message ends with a colon, a space, and
      // the "extra" characters.  We rely on that instead of
      // attempting to perfectly reproduce the parsing algorithm.
      date = this._base_parseDate(format, value.substring(0,value.length-(err.length-err.indexOf(':')-2)), settings);
      $.datepicker.log("Error parsing the date string: " + err + "\ndate string = " + value + "\ndate format = " + format);
    }
    return date;
  };

  /*
  * override formatDate to set date with time to the input
  */
  $.datepicker._base_formatDate = $.datepicker._formatDate;
  $.datepicker._formatDate = function(inst, day, month, year) {
    var tp_inst = this._get(inst, 'timepicker');
    if (tp_inst) {
      tp_inst._updateDateTime(inst);
      return tp_inst.$input.val();
    }
    return this._base_formatDate(inst);
  };

  /*
  * override options setter to add time to maxDate(Time) and minDate(Time). MaxDate
  */
  $.datepicker._base_optionDatepicker = $.datepicker._optionDatepicker;
  $.datepicker._optionDatepicker = function(target, name, value) {
    var inst = this._getInst(target),
          name_clone;
    if (!inst) {
      return null;
    }

    var tp_inst = this._get(inst, 'timepicker');
    if (tp_inst) {
      var min = null,
        max = null,
        onselect = null,
        overrides = tp_inst._defaults.evnts,
        fns = {},
        prop;
        if (typeof name == 'string') { // if min/max was set with the string
            if (name === 'minDate' || name === 'minDateTime') {
                min = value;
            } else if (name === 'maxDate' || name === 'maxDateTime') {
                max = value;
            } else if (name === 'onSelect') {
                onselect = value;
            } else if (overrides.hasOwnProperty(name)) {
                if (typeof (value) === 'undefined') {
                    return overrides[name];
                }
                fns[name] = value;
                name_clone = {}; //empty results in exiting function after overrides updated
            }
        } else if (typeof name == 'object') { //if min/max was set with the JSON
            if (name.minDate) {
                min = name.minDate;
            } else if (name.minDateTime) {
                min = name.minDateTime;
            } else if (name.maxDate) {
                max = name.maxDate;
            } else if (name.maxDateTime) {
                max = name.maxDateTime;
            }
            for (prop in overrides) {
                if (overrides.hasOwnProperty(prop) && name[prop]) {
                    fns[prop] = name[prop];
                }
            }
        }
        for (prop in fns) {
            if (fns.hasOwnProperty(prop)) {
                overrides[prop] = fns[prop];
                if (!name_clone) { name_clone = $.extend({}, name);}
                delete name_clone[prop];
            }
        }
        if (name_clone && isEmptyObject(name_clone)) { return; }
        if (min) { //if min was set
            if (min === 0) {
                min = new Date();
            } else {
                min = new Date(min);
            }
            tp_inst._defaults.minDate = min;
            tp_inst._defaults.minDateTime = min;
        } else if (max) { //if max was set
            if (max === 0) {
                max = new Date();
            } else {
                max = new Date(max);
            }
            tp_inst._defaults.maxDate = max;
            tp_inst._defaults.maxDateTime = max;
        } else if (onselect) {
            tp_inst._defaults.onSelect = onselect;
        }
    }
    if (value === undefined) {
      return this._base_optionDatepicker.call($.datepicker, target, name);
    }
    return this._base_optionDatepicker.call($.datepicker, target, name_clone || name, value);
  };
  /*
  * jQuery isEmptyObject does not check hasOwnProperty - if someone has added to the object prototype,
  * it will return false for all objects
  */
  var isEmptyObject = function(obj) {
    var prop;
    for (prop in obj) {
      if (obj.hasOwnProperty(obj)) {
        return false;
      }
    }
    return true;
  };

  /*
  * jQuery extend now ignores nulls!
  */
  var extendRemove = function(target, props) {
    $.extend(target, props);
    for (var name in props) {
      if (props[name] === null || props[name] === undefined) {
        target[name] = props[name];
      }
    }
    return target;
  };

  /*
  * Determine by the time format if should use ampm
  * Returns true if should use ampm, false if not
  */
  var useAmpm = function(timeFormat){
    return (timeFormat.indexOf('t') !== -1 && timeFormat.indexOf('h') !== -1);
  };

  /*
  * Converts 24 hour format into 12 hour
  * Returns 12 hour without leading 0
  */
  var convert24to12 = function(hour) {
    if (hour > 12) {
      hour = hour - 12;
    }

    if (hour == 0) {
      hour = 12;
    }

    return String(hour);
  };

  /*
  * Splits datetime string into date ans time substrings.
  * Throws exception when date can't be parsed
  * Returns [dateString, timeString]
  */
  var splitDateTime = function(dateFormat, dateTimeString, dateSettings, timeSettings) {
    try {
      // The idea is to get the number separator occurances in datetime and the time format requested (since time has 
      // fewer unknowns, mostly numbers and am/pm). We will use the time pattern to split.
      var separator = timeSettings && timeSettings.separator ? timeSettings.separator : $.timepicker._defaults.separator,
        format = timeSettings && timeSettings.timeFormat ? timeSettings.timeFormat : $.timepicker._defaults.timeFormat,
        timeParts = format.split(separator), // how many occurances of separator may be in our format?
        timePartsLen = timeParts.length,
        allParts = dateTimeString.split(separator),
        allPartsLen = allParts.length;

      if (allPartsLen > 1) {
        return [
            allParts.splice(0,allPartsLen-timePartsLen).join(separator),
            allParts.splice(0,timePartsLen).join(separator)
          ];
      }

    } catch (err) {
      $.datepicker.log('Could not split the date from the time. Please check the following datetimepicker options' +
          "\nthrown error: " + err +
          "\ndateTimeString" + dateTimeString +
          "\ndateFormat = " + dateFormat +
          "\nseparator = " + timeSettings.separator +
          "\ntimeFormat = " + timeSettings.timeFormat);

      if (err.indexOf(":") >= 0) {
        // Hack!  The error message ends with a colon, a space, and
        // the "extra" characters.  We rely on that instead of
        // attempting to perfectly reproduce the parsing algorithm.
        var dateStringLength = dateTimeString.length - (err.length - err.indexOf(':') - 2),
          timeString = dateTimeString.substring(dateStringLength);

        return [$.trim(dateTimeString.substring(0, dateStringLength)), $.trim(dateTimeString.substring(dateStringLength))];

      } else {
        throw err;
      }
    }
    return [dateTimeString, ''];
  };

  /*
  * Internal function to parse datetime interval
  * Returns: {date: Date, timeObj: Object}, where
  *   date - parsed date without time (type Date)
  *   timeObj = {hour: , minute: , second: , millisec: } - parsed time. Optional
  */
  var parseDateTimeInternal = function(dateFormat, timeFormat, dateTimeString, dateSettings, timeSettings) {
    var date;
    var splitRes = splitDateTime(dateFormat, dateTimeString, dateSettings, timeSettings);
    date = $.datepicker._base_parseDate(dateFormat, splitRes[0], dateSettings);
    if (splitRes[1] !== '') {
      var timeString = splitRes[1],
        parsedTime = $.datepicker.parseTime(timeFormat, timeString, timeSettings);

      if (parsedTime === null) {
        throw 'Wrong time format';
      }
      return {
        date: date,
        timeObj: parsedTime
      };
    } else {
      return {
        date: date
      };
    }
  };

  /*
  * Internal function to set timezone_select to the local timezone
  */
  var selectLocalTimeZone = function(tp_inst, date) {
    if (tp_inst && tp_inst.timezone_select) {
      tp_inst._defaults.useLocalTimezone = true;
      var now = typeof date !== 'undefined' ? date : new Date();
      var tzoffset = $.timepicker.timeZoneOffsetString(now);
      if (tp_inst._defaults.timezoneIso8601) {
        tzoffset = tzoffset.substring(0, 3) + ':' + tzoffset.substring(3);
      }
      tp_inst.timezone_select.val(tzoffset);
    }
  };

  /*
  * Create a Singleton Insance
  */
  $.timepicker = new Timepicker();

  /**
   * Get the timezone offset as string from a date object (eg '+0530' for UTC+5.5)
   * @param  date
   * @return string
   */
  $.timepicker.timeZoneOffsetString = function(date) {
    var off = date.getTimezoneOffset() * -1,
      minutes = off % 60,
      hours = (off - minutes) / 60;
    return (off >= 0 ? '+' : '-') + ('0' + (hours * 101).toString()).substr(-2) + ('0' + (minutes * 101).toString()).substr(-2);
  };

  /**
   * Calls `timepicker()` on the `startTime` and `endTime` elements, and configures them to
   * enforce date range limits.
   * n.b. The input value must be correctly formatted (reformatting is not supported)
   * @param  Element startTime
   * @param  Element endTime
   * @param  obj options Options for the timepicker() call
   * @return jQuery
   */
  $.timepicker.timeRange = function(startTime, endTime, options) {
    return $.timepicker.handleRange('timepicker', startTime, endTime, options);
  };

  /**
   * Calls `datetimepicker` on the `startTime` and `endTime` elements, and configures them to
   * enforce date range limits.
   * @param  Element startTime
   * @param  Element endTime
   * @param  obj options Options for the `timepicker()` call. Also supports `reformat`,
   *   a boolean value that can be used to reformat the input values to the `dateFormat`.
   * @param  string method Can be used to specify the type of picker to be added
   * @return jQuery
   */
  $.timepicker.dateTimeRange = function(startTime, endTime, options) {
    $.timepicker.dateRange(startTime, endTime, options, 'datetimepicker');
  };

  /**
   * Calls `method` on the `startTime` and `endTime` elements, and configures them to
   * enforce date range limits.
   * @param  Element startTime
   * @param  Element endTime
   * @param  obj options Options for the `timepicker()` call. Also supports `reformat`,
   *   a boolean value that can be used to reformat the input values to the `dateFormat`.
   * @param  string method Can be used to specify the type of picker to be added
   * @return jQuery
   */
  $.timepicker.dateRange = function(startTime, endTime, options, method) {
    method = method || 'datepicker';
    $.timepicker.handleRange(method, startTime, endTime, options);
  };

  /**
   * Calls `method` on the `startTime` and `endTime` elements, and configures them to
   * enforce date range limits.
   * @param  string method Can be used to specify the type of picker to be added
   * @param  Element startTime
   * @param  Element endTime
   * @param  obj options Options for the `timepicker()` call. Also supports `reformat`,
   *   a boolean value that can be used to reformat the input values to the `dateFormat`.
   * @return jQuery
   */
  $.timepicker.handleRange = function(method, startTime, endTime, options) {
    $.fn[method].call(startTime, $.extend({
      onClose: function(dateText, inst) {
        checkDates(this, endTime, dateText);
      },
      onSelect: function(selectedDateTime) {
        selected(this, endTime, 'minDate');
      }
    }, options, options.start));
    $.fn[method].call(endTime, $.extend({
      onClose: function(dateText, inst) {
        checkDates(this, startTime, dateText);
      },
      onSelect: function(selectedDateTime) {
        selected(this, startTime, 'maxDate');
      }
    }, options, options.end));
    // timepicker doesn't provide access to its 'timeFormat' option, 
    // nor could I get datepicker.formatTime() to behave with times, so I
    // have disabled reformatting for timepicker
    if (method != 'timepicker' && options.reformat) {
      $([startTime, endTime]).each(function() {
        var format = $(this)[method].call($(this), 'option', 'dateFormat'),
          date = new Date($(this).val());
        if ($(this).val() && date) {
          $(this).val($.datepicker.formatDate(format, date));
        }
      });
    }
    checkDates(startTime, endTime, startTime.val());

    function checkDates(changed, other, dateText) {
      if (other.val() && (new Date(startTime.val()) > new Date(endTime.val()))) {
        other.val(dateText);
      }
    }
    selected(startTime, endTime, 'minDate');
    selected(endTime, startTime, 'maxDate');

    function selected(changed, other, option) {
      if (!$(changed).val()) {
        return;
      }
      var date = $(changed)[method].call($(changed), 'getDate');
      // timepicker doesn't implement 'getDate' and returns a jQuery
      if (date.getTime) {
        $(other)[method].call($(other), 'option', option, date);
      }
    }
    return $([startTime.get(0), endTime.get(0)]);
  };

  /*
  * Keep up with the version
  */
  $.timepicker.version = "1.1.1";

})(jQuery);