function popUp(URL) {
    day = new Date();
    id = 'pop' + day.getTime();
    eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=1,width=640,height=480,left = 320,top = 272');");
}