<html>
<head>
<title>JavaScript sample code</title>
</head>
<body>
<script language="JavaScript" type="text/javascript">
<!--
function checkname() {
alert("Your name is " + document.forms[0].fullname.value)
}
//-->
</script>
<h1>OnSubmit Form example</h1>
<form action="#" method="GET" onsubmit="return checkname()">
What is your name? <br>
<input type="text" name="fullname"> <br>
<input type="submit" value="Submit Form">
</form>
</body>
</html>