rest_in_place = function(element, url, objectName, attributeName){
  var e = element;

  function clickFunction(){
    var oldValue = e.innerHTML.replace(/^\s*|\s*$/g,'');
    function submitFunction(){
      var value = Form.Element.getValue(e.select('input')[0]);
      e.innerHTML = "saving...";
      new Ajax.Request(url,{
        method: 'put',
        parameters: objectName+'['+attributeName+']='+encodeURIComponent(value)+(window.rails_authenticity_token ? "&authenticity_token="+encodeURIComponent(window.rails_authenticity_token) : ''),
        onSuccess: function(transport){
          new Ajax.Request(url, {
            method: 'get',
            requestHeaders: { "Accept" : "application/javascript"},
            onSuccess : function(xhr){
              var data = xhr.responseText.evalJSON();
              e.innerHTML = data[objectName][attributeName];
              Event.observe(e,'click', clickFunction);
            }
          });
        }
      });
      return false;
    }
    e.innerHTML = '<form action="javascript:void(0)" style="display:inline;"><input type="text" value="' + oldValue + '"></form>';
    Form.Element.select(e.select('input')[0]);
    Event.stopObserving(e, 'click', clickFunction);
    Event.observe(e.select('input')[0], 'blur', function(){
      e.innerHTML = oldValue;
      Event.observe(e, 'click', clickFunction);
    });
    Event.observe(e.select('form')[0], 'submit', submitFunction);
  }

  Event.observe(e,'click', clickFunction);
};

Event.observe(window, 'load',function() {
  $$(".rest_in_place").each(function(e){
    var url; var obj; var attrib;
    Element.ancestors(e).each(function(a){
      url    = url    || Element.readAttribute(a, 'url');
      obj    = obj    || Element.readAttribute(a, 'object');
      attrib = attrib || Element.readAttribute(a, 'attribute');
    });
    Element.ancestors(e).each(function(a){
      if (res = a.id.match(/^(\w+)_(\d+)$/i)) {
        obj = obj || res[1];
      }
    });
    url    = Element.readAttribute(e, 'url')       || url    || document.location.pathname;
    obj    = Element.readAttribute(e, 'object')    || obj;
    attrib = Element.readAttribute(e, 'attribute') || attrib;
    rest_in_place(e, url, obj, attrib);
  });
});