rem: return div.childNodes[0].nodeValue; 
add: return div.childNodes[0] ? div.childNodes[0].nodeValue : ''; 
context:   unescapeHTML: function() {    var div = document.createElement('div');    div.innerHTML = this.stripTags();    return div.childNodes[0].nodeValue;  },
meta: 4319	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/4319/7d101d58400acaff232091485c8e140f0a37cbaf/prototype.js/buggy/actionpack/lib/action_view/helpers/javascripts/prototype.js