function popWin(event, winw, winh, scrollyn){
	var screenh = (screen.height)/2;
	var screenw = (screen.width)/2;
	var wint = screenh - (winh/2);
	var winl = screenw - (winw/2);
	if(scrollyn == ""){
		scrollyn = "no";
	}
	window.open(event,'_blank','toolbar=no,directories=no,status=no,menubar=no,scrollbars='+scrollyn+',resizable=no,copyhistory=no,width='+winw+',height='+winh+',top='+wint+',left='+winl);
}