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: 4707	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/4707/50c3492c4c3c825dbd3401e134a19ed46799c456/prototype.js/clean/www/resources/prototype/prototype.js