function popUp(URL) {
  day = new Date();
  id = day.getTime();
  eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=1,scrollbars=1,location=0,statusbar=1,menubar=0,resizable=0,width=" + (screen.availWidth-10) + ",height=" + (screen.availHeight-80) + ",left=0,top=0');");
}