function Check_Mail(mail) {
	var Pattern = new RegExp('^[a-zA-Z][0-9a-zA-Z_/-]*[a-zA-Z][0-9a-zA-Z_.]*@[a-zA-Z][0-9a-zA-Z_/-]*(\\.[a-zA-Z][0-9a-zA-Z_]*)+$');
	Status = Pattern.test(mail);
	if (mail!="") if (Status==false) return false;
	return true;
}