use the test function for validating of email address in java script

<form action="" method="POST" name="frm1">
 <table>
         <tr>
            <td>
                 Email :
            </td>
            <td>
                <input type="text" name="user_email" />
            </td>
        </tr>
        

        <tr>         
            <td>
                <input type="submit" value="submit" onclick="validateEmail(user_email)"  />
            </td>
        </tr>
    </table>
 </form>

<script language="JavaScript" type="text/javascript">

function validateEmail(email) { 
       //// email=document.forms["frm1"]["user_email"].value; // 

 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);

</script>