rem: return elements.select(selector.match.bind(selector)); 
add: return elements.select(selector.match.bind(selector)).collect(Element.extend); 
context:   matchElements: function(elements, expression) {    var selector = new Selector(expression);    return elements.select(selector.match.bind(selector));  },
meta: 4973	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/4973/5b4e6f2ec3060c014c75fcb350d82a0f1753e449/prototype.js/clean/lib/prototype.js