<html>
<body>
<form action="script.htm" method="POST">
<input type=hidden name="Screen" value="1">
Screen 1<br>
<input type=submit name="Command" value="Start" onClick="document.forms[0].Command.action = 'Start'">
<input type=submit name="Command" value="Next" onClick="document.forms[0].Command.action = 'Next'">
</form>
</body>
</html>