A simple script to check the email by Javascript

gistfile1.js

    function isEmail(email) {
      var regex = /^([a-zA-Z0-9_\.\-\+])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
      return regex.test(email);
    }
    
    /*
    * usage:
    * var check = isEmail(example@email.com);
    */