rem: return nodeRef.firstChild; 
add: return nodeRef.childNodes[0]; 
context: function _firstChild(nodeRef) {  return nodeRef.firstChild;}
meta: 3248	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/3248/b5262851138d23bc9e0a27cd12d85b1727613e2e/jslib.js/buggy/lib/js/jslib.js