I’m trying to use javascript to check if an text field is empty or not before submitting it to be processed. I’m new to javascript and the code below looks fine to me but it doesn’t work for some reason. Can anyone help me out? I only want to validate a single field and want the javascript to be as “compact” as possible.
<head>
<title>Untitled Document</title>
<script type="text/javascript">
function validate_form(form) {
if(form.name.value==NULL||form.name.value=='') {
alert('The name field is required.');
form.name.focus();
return false;
} else { return true; }
}
</script>
</head>
<body>
<form action="process.php" method="post" onsubmit="return validate_form(this)">
Name: <input type="text" name="name" /> <input type="submit" name="submit" value="submit" />
</form>
</body>
</html>
Many thanks,
ZW
