add: Event.stop(event); 
context:   onHover: function(event) {    element = Event.findElement(event, 'LI');    if(this.index != element.autocompleteIndex)     {        this.index = element.autocompleteIndex;        this.render();    }  },
meta: 5521	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5521/0ffcceffac52cc4ed373eb9db27d6c776b5d96b7/controls.js/buggy/actionpack/lib/action_view/helpers/javascripts/controls.js