Validate Email Id using Regex and JQuery

This snippet shows how to validate email id using Regular Expression using JQuery

<script type="text/javascript">
    function ValidateEmail(email) {
        var expr = /^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/;
        return expr.test(email);
    };
    $("#validator").live("click", function() {
        if (!ValidateEmail($("#txtMail").val())) {
            alert("Invalid email address.Please enter valid email address.");
        } else {
            alert("Valid email address.");
        }
    });
</script>
<input type="text" id="txtMail" />
<input type="button" id="validator" value="validate email" />