<html>
<head>
<script>
String.prototype.ValidateEmail = function (evt)
{
var eVal = new RegExp("\\w+([-+.\’]\\w+)*@\\w+([-.]\\w+)*\\.\\w+([-.]\\w+)*");
var chkVal = eVal.exec(this);
if(chkVal != null)
{
alert('Id Correct');
}
else
{
alert('Check Your Id');
}
</script>
</head>
<body>
<input type="text" id="txtEmail" width="30px" onblur="this.value.ValidateEmail();" />
</body>
</html>
ProgramDemo
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