What happens when javascript is turned off, I have used the ajaxtoolkit exstensively over my website...

If Ajaxtoolkit controls fails while javascript is off, can I do  test of javascript (on/off) and send user away from my page(s) to an error page "Please turn Javascript on before using this page xxx" or else !! 

Is there a method/control for this safety check ???

 to check weahter javascript is enabled or not read this

http://www.codeproject.com/KB/user-controls/CheckJavascriptEnabled.aspx

or

<script type="text/javascript">

  document.write("<p>JavaScript is enabled.</p>");

</script>

<noscript>

  JavaScript is not enabled or not supported.

</noscript>