function popUp(URL,breedte,hoogte) {
day = new Date();
id = day.getTime();
eval("page" + id + " = window.open('../popup.php?img="+URL+"', '" + id + "', 'toolbar=0,scrollbars=0,location=0,statusbar=0,status=0,menubar=0,resizable=0,width='+breedte+',height='+hoogte+'');");
}