add: return elements; 
context: document.getElementsByClassName = function(className, parentElement) {  if (Prototype.BrowserFeatures.XPath) {    var q = ".//*[contains(concat(' ', @class, ' '), ' " + className + " ')]";    return document._getElementsByXPath(q, parentElement);  } else {    var children = ($(parentElement) || document.body).getElementsByTagName('*');    var elements = [], child;    for (var i = 0, length = children.length; i < length; i++) {      child = children[i];      if (Element.hasClassName(child, className))        elements.push(Element.extend(child));    }    return elements;  }};
meta: 7608	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/7608/d556a0875c83645645bd2067594241546d26d052/prototype.js/buggy/web/js/prototype.js