add:  currentDocument = null;  
context: function openLocation(target, onloadCallback) {    var el = new SelfRemovingLoadListener(onloadCallback);    addLoadListener(getIframe(), el.invoke);    getIframe().src = target;}
meta: 3175	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/3175/b845efcbd913c9121c01866d3803959609b3585d/selenium-browserbot.js/buggy/javascript/selenium-browserbot.js