var newwindow;
	function popupWindow(url,ht,wd,scrlbrs)
	{	if (newwindow && !newwindow.closed){
			newwindow.resizeTo(wd,ht);
			newwindow.location.href = url;
		}
		else
		{	newwindow=window.open(url,'details','height=' + ht + ',width=' + wd + 		',left=300,top=300,resizable=no,scrollbars=' + scrlbrs + ',toolbar=no,status=no');
		}
		if (window.focus) {newwindow.focus()}
	}