add:  currentDocument = null;  
context: function openLocation(target, onloadCallback) {    var el = new SelfRemovingLoadListener(onloadCallback);    addLoadListener(getIframe(), el.invoke);    getIframe().src = target;}
meta: 4983	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/4983/372f0fea11088c31100c973444ebeb1c27022a77/selenium-browserbot.js/clean/javascript/selenium-browserbot.js