var xb =
{
  evtHash: [],
 
  addEvent: function(_elem, _evtName, _fn, _useCapture)
  {
    if (typeof _elem.addEventListener != 'undefined')
    { _elem.addEventListener(_evtName, _fn, _useCapture); }
    else if (typeof _elem.attachEvent != 'undefined')
    {
      var key = '{FNKEY::obj_' + _elem.uniqueID + '::evt_' + _evtName + '::fn_' + _fn + '}';
      var f = xb.evtHash[key];
      if (typeof f != 'undefined')
        { return; }
       
      f = function()
      {
        _fn.call(_elem);
      };
     
      xb.evtHash[key] = f;
      _elem.attachEvent('on' + _evtName, f);

      // attach unload event to the window to clean up possibly IE memory leaks
      window.attachEvent('onunload', function()
      {
        _elem.detachEvent('on' + _evtName, f);
      });
     
      key = null;
      //f = null;   /* DON'T null this out, or we won't be able to detach it */
    }
    else
      { _elem['on' + _evtName] = _fn; }
  },
 
  removeEvent: function(_elem, _evtName, _fn, _useCapture)
  {
    if (typeof _elem.removeEventListener != 'undefined'){
		_elem.removeEventListener(_evtName, _fn, _useCapture);
	} else if (typeof _elem.detachEvent != 'undefined'){
	var key = "{FNKEY::obj_" + _elem.uniqueID + "::evt"+ _evtName + "::fn_" + _fn + "}";
      var f = xb.evtHash[key];
      if (typeof f != 'undefined')
      {
        _elem.detachEvent('on' + _evtName, f);
        delete xb.evtHash[key];
      }
     
      key = null;
      //f = null;   /* DON'T null this out, or we won't be able to detach it */
    }
  }
}
addLoadHandler(setCollapsibles, new Array("'collapse-link'", "'collapse-link'", "'collapsible'", false, 0, "'A'", true, true));