code: function(e) {
  	   Event.stopEvent(e);
  	   
  	   // Prevent adding a new field if already at maxItems
  	   if( lang.isNumber(this.options.maxItems) && this.subFields.length >= this.options.maxItems ) {
  	      return;
  	   }
  	   
  	   // Add a field with no value: 
  	   var subFieldEl = this.addElement();
  	   
  	   // Focus on this field
  	   subFieldEl.focus();
  	   
  	   // Fire updated !
  	   this.fireUpdatedEvt();
  	}
docs: Add a new element to the list and fire updated event
  @param {Event} e The original click event