function popUp() {
	w = 940;
	h = 478;
	t = (screen.height - h) / 2;
	l = (screen.width - w) / 2;

  day = new Date();
  id = day.getTime();
  eval("page" + id + " = window.open('emp_app.php', '" + id + "', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=" + w + ",height=" + h + ",left=" + l + ",top=" + t + "');");
}