<!DOCTYPE html>
<html>
<head>
<title>Simple Function Demo-aimtocode.com</title>
<script type="text/javascript">
function firstfunction()
{
document.write("This is my first function")
}
</script>
</head>
<body>
<form>
<input type="button" value="Click me!" onclick="firstfunction()">
</form>
</body>
</html>