<html>
<title>javascript 4 program</title>
<script>
function validate() {
if (document.myForm.name.value == "") {
alert("Enter a name");
document.myForm.name.focus();
return false;
}
if (!/^[a-zA-Z]*$/g.test(document.myForm.name.value)) {
alert("Invalid characters");
document.myForm.name.focus();
return false;
}
}
</script>
<body>
<form name="myForm">
Enter Text<input type=text name="name">
<input type="Submit" onclick="validate();">
</form>
</body>
</html>
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You can use [html][/html], [css][/css], [php][/php] and more to embed the code. Urls are automatically hyperlinked. Line breaks and paragraphs are automatically generated.