function popup(url) {
	window.open(url,'WitteReusGame','width=894,height=479,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,copyhistory=no,resizable=no');
}

function preview(url) {
	window.open(url,'WitteReusEcard','width=768,height=466,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,copyhistory=no,resizable=no');
}