var windowReference;

function NewBrowserWindow() {

type="n2";
browser = navigator.appName;
version = parseInt(navigator.appVersion);
position=navigator.appVersion.indexOf("MSIE");
IEVersion=navigator.appVersion.slice(position+5,position+6);
if (browser == "Netscape" && version >= 3) type = "n3";
else if (browser == "Netscape" && version == 2) type = "n2";
else if (browser == "Microsoft Internet Explorer" && version >= 2 && IEVersion<5) type = "e3";
else if (browser == "Microsoft Internet Explorer" && IEVersion>=5) type = "e5";
if (windowReference) {if (type=="e3" || type=="n2") {if (! windowReference.closed) {windowReference.close();}}} 
windowReference = window.open("","NewBrowserWindow","width=640,height=400,resizable=yes,toolbar=yes,menubar=yes,location=yes,status=yes,scrollbars=yes");
if (type == "n3" || type == "e5") windowReference.focus();
}

function changeframe(url) {
parent.sidebar.location.href = url; 
myform.advancedsearch.selectedIndex=0;
};