Email validation regular expression in javascript

22-02-2017 email validation regex

The html code is

<script src=""></script>
  <p>Enter email:</p>
  <input id='email'>
  <button type='submit' onclick='validateEmail()'>Check Email</button>

Now when the button is clicked then the JavaScript function validateEmail() will be called. The bellow code in this function. Using regular expressions is probably the best way.

function validateEmail(){
   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   var email = document.getElementById('email').value;

   if (reg.test(email) == false) 
      alert("Invalid Email Address");
      return false;




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