function popcomprar(ref) {
day = new Date();
id = day.getTime();
eval("page" + id + " = window.open('popcomprar.php?ref="+ ref +"', '" + id + "', 'toolbar=0,location=0,scrollbars=1,statusbar=0,menubar=0,resizable=1,width=624,height=750,left = 100,top = 20');");
}
// End -->