Use Regular Expression by JavaScript

Use Regular Expression by JavaScript
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    1 function validateEmail()

    2     {

    3         // Value to Validate. Ex. Your EMail Address TextBox

    4         var EMailID = document.getElementById('txtEMail').value;

    5 

    6         // Here, we set the Expression to Validate the Value for EMail Address.

    7         var EMailValidate = /^([a-zA-Z0-9])+([\.a-zA-Z0-9_-])*@([a-zA-Z0-9])+(\.[a-zA-Z0-9_-]+)+$/;

    8 

    9         // Test the Validator.

   10         if( EMailValidate.test(EMailID)) 

   11         {

   12             alert('Right Email Address.');

   13         }

   14         else

   15         {

   16             alert('Wrong Email Address.');

   17         }

   18     }