var popup = "";
function winOpen(url, height){
	var winHeight = (height? height : 375);
	if (!popup.closed && popup.location) {
		popup.location.href = url;
	} else {
		popup = window.open(url, 'popup', 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=yes,copyhistory=no,width=450,height=' + winHeight)	
	}
	popup.focus();
}