code: function(obj) {
  		var inst = this._getInst(obj);
  		var isRTL = this._get(inst, 'isRTL');
          while (obj && (obj.type == 'hidden' || obj.nodeType != 1 || $.expr.filters.hidden(obj))) {
              obj = obj[isRTL ? 'previousSibling' : 'nextSibling'];
          }
          var position = $(obj).offset();
  	    return [position.left, position.top];
  	}
docs: /* Find an object's position on the screen.