function EmailCHK(email) { 
	  reEmail=/^[^@\s]+@[^@\.\s]+\.[^@\.\s]+(\.[^@\.\s]+(\.[^@\.\s]+)?)?$/ 
	
	  if(!reEmail.test(email)) 
	  { 
		alert( "Email填寫有誤" ); 
		f.UserEmail.focus(); 
		return false; 
	  } 
	  return true;
}