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<html>
<head>
<title>E-mail Example</title>
<script type="text/javascript">
function isValidEmail(sText) {
var reEmail = /^(?:\w+\.?)*\w+@(?:\w+\.)+\w+$/;
return reEmail.test(sText);
}
function validate() {
var oInput1 = document.getElementById("txt1");
if (isValidEmail(oInput1.value)) {
alert("Valid");
} else {
alert("Invalid!");
}
}
</script>
</head>
<body>
<P>E-mail Address: <input type="text" id="txt1" /><br />
<input type="button" value="Validate" onclick="validate()" /></p>
</body>
</html>
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