rem: var start = Utils.getDocument().fxdriver_elements.length; Utils.getDocument().fxdriver_elements.push(element); 
add: var start = doc.fxdriver_elements.length; doc.fxdriver_elements.push(element); 
context: Utils.addToKnownElements = function(element) {    if (!Utils.getDocument().fxdriver_elements) {        Utils.getDocument().fxdriver_elements = new Array();    }    var start = Utils.getDocument().fxdriver_elements.length;    Utils.getDocument().fxdriver_elements.push(element);    return start;};
meta: 3428	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/3428/3aa848daac3cf6b346c932bafbb7bfd763430786/utils.js/clean/firefox/src/extension/content/utils.js