function popupImage(fn) {
  window.open (fn, "", "status=0,toolbar=0,resizable=1,width=850,height=560");
}
function verifyEmail(e) {
  var re = /^[a-zA-Z0-9._-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}$/
  return re.test(f);
}