If your page was served through Jaxer and made use of any of Jaxer's capabilities (e.g. you used <script runat="server"> anywhere in it), then Jaxer will have modified the page sent to your browser, and added JavaScript to your HTML that defines "Jaxer."

So to see if Jaxer processed your page, view the source of the page in your browser. You should see the following line near the top of the page:

<script type="text/javascript"> /** Jaxer clientFramework_compressed.js - ... </script>

If you see this page, "Jaxer" should be defined as a global JavaScript object in your page on the browser. If you don't see this line, perhaps Jaxer is not running, or for some reason did not process your page. If you are running Jaxer in Studio, make sure the Jaxer button is green, otherwise click it to turn on Jaxer.