<a onclick="window.open(document.URL, '_blank', 'location=yes,height=570,width=520,scrollbars=yes,status=yes');">
Open New Window
</a>window.open('page2.html')<script type="text/javascript">
function fnc1()
{
var a=window.location.href;
username="p";
password=1234;
window.open(a+'?username='+username+'&password='+password,"");
}
</script>
<input type="button" onclick="fnc1()" />
<input type="text" id="atext" />browser detection and version dectaction in js