Behaviour.register({
    '.naction_remove_hash': function(el) { 
      el.onclick = function(){
        //remove a hash list item
        parentEl = el
        while(parentEl.tagName != 'LI'){
          parentEl = parentEl.parentNode
        }
        Element.remove(parentEl);
        return false;
      }
    },
    '.naction_add_hash': function(el) { 
      el.onclick = function() {
        //add a hash list item
        ulEl = $(el.id+'_list');
        newkey = $(el.id+'_key').value;
        if(newkey.length > 0){
          new Ajax.Request('../hash_tag_item/'+el.id+'/'+newkey+'/'+$(el.id+'_value').value, {
            asynchronous:true, 
            onComplete: function(t){
             ulEl.innerHTML += t.responseText;
             Behaviour.apply();
            }
          });
        }
        return false;
      }
    },
    '.naction_remove_rel': function(el) { 
      el.onclick = function() {
        //remove rel from list and add option to pulldown
        parentEl = el
        while(parentEl.tagName != 'LI'){
          parentEl = parentEl.parentNode
        }
        rel_oid = parentEl.getElementsByTagName('input')[0].value;
        rel_name = parentEl.getElementsByTagName('input')[0].name.substr(0, parentEl.getElementsByTagName('input')[0].name.length-2);
        rel_display = parentEl.getElementsByTagName('span')[0].innerHTML;
        newOpt = document.createElement('option');
        newOpt.value = rel_oid;
        newOpt.appendChild(document.createTextNode(rel_display));
        $(rel_name+'_selector').appendChild(newOpt);
        Element.remove(parentEl);
        return false;
      }
    },
    '.naction_add_rel': function(el) { 
      el.onclick = function() {
        //add a relation list item and remove item from options
        ulEl = $(el.id+'_list');
        selectorEl = $(el.id+'_selector');
        // TODO: moz allows a select box with 0 options in it? ... disabled must be set with js
        selectedElement = selectorEl.options[selectorEl.selectedIndex]
        sURL = '../relation_item/'+el.id+'/'+selectedElement.innerHTML+'/'+selectedElement.value
        new Ajax.Request(sURL, {
          asynchronous:true,
          onComplete: function(t){
            ulEl.innerHTML += t.responseText;
            Behaviour.apply();
          },
          onFailure: function(t){ 
            // TODO: put the rel back in the option list 
            // chrisfarms: UNTESTED... selectedEl might not be availible?
            // prob wont work in ffox. since moz doesnt like innerHTML used like this with options
            selectorEl.innerHTML += '<option value="'+selectedElement.value+'">'+selectedElement.innerHTML+'</option>'
          }
        }); 
        Element.remove(selectedElement);
        return false;
      }
    }
  });