// 验证邮箱函数,正确返回 true，错误返回false

function validateEmail(email) { 

   var re = /^(([^()[\]\\.,;:\s@\"]+(\.[^()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;

   return re.test(email);

}

document.write(validateEmail('123@runcodex.com'));

document.write("<br>");

document.write(validateEmail('123'));