Help With Javascript

[Tetsuo]

<SCRIPT LANGUAGE="JavaScript">
function popUp(URL) {
day = new Date();
id = day.getTime();
eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=0,width=933,height=856,left = 276,top = 82');");
}
// End -->
</script>

that is the code, i cant get it to work properly

can anyone help me out?