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copied!<p>I don’t know how you would inject JavaScript into someone else’s pages, which would then send you messages. That actually sounds like something a virus would do. <br/></p> <p>I think you could accomplish something like what you want using an iframe.<br/> A simple method would be to include an iframe preset to load the “start” location on your site, and then include a button on the outer page for the user to post back their current location (in the iframe). </p> <p>When the button on your page is pressed you could query the current state of the iframe…<br/> References to the window generated by the iframe and to the document loaded into the iframe can be obtained via the frames array using the name attribute. <br/></p> <pre><code> window.frames[iframeName] <br/> window.frames[iframeName].document <br/> </code></pre> <p>The frames array method of referencing has broad support, even among quite old browsers, as long as you attach a name attribute to the iframe. For best results, use both name and id. <br/></p> <p>For more up-to-date browsers, the document inside the iframe can also be referenced via contentWindow (IE win) and contentDocument (DOM) properties of the iframe element: <br/></p> <pre><code>// IE5.5+ windows document.getElementById(iframeId).contentWindow document.getElementById(iframeId).contentWindow.document or, // DOM document.getElementById(iframeId).contentDocument </code></pre> <p>EDIT: As the comments below suggest, it looks like most browsers prevent you from using an iframe this way. You can start a window anwhere you want, but you are not allowed to communicate with it if it is not on your same domain. I guess you could build a "Man in the Middle" scenerio, where you flow all the trafic through your server first, but that is not very practical. </p> <p>Here is a good example of jQuery controlling an iframe</p> <p><a href="http://wwwendt.de/tech/dynatree/doc/sample-iframe.html" rel="nofollow noreferrer">http://wwwendt.de/tech/dynatree/doc/sample-iframe.html</a></p> <p>Hope that helps.</p>

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