Topic awaiting preservation: Crossdomain javascript... (Page 1 of 1)

Hi,

The scenario is, you have an inline frame, and its onload calls a javascript function. Everytime someone navigates in the page, I do things like get the title, get the height, etc. However, if they navigate away from my domain in the frame, then this will produce javascript error messages. My question is, is there any way to determine if the frame is in my domain or not? Preferably without js errors. I mean, maybe there is error handling, or something that can be used to hide the error messages, or there is a boolean, I don't know.

Thanks,
Hub-izer

You could test for the existance of something inside the iframe (e.g. the inner document) inside try/catch blocks. If your test fails (due to permission errors) you can catch the exception and know that the document inside the iframe is outside your domain.

Try something like this:

function isInDomain() {

   var returnVal = false;

   try {

       frame = document.getElementById('idOfYourIframe');

       if (frame.contentDocument | | frame.contentWindow.document) {

          returnVal = true;

       }

   }

   catch (e) {

      returnVal = false;

   }

   finally {

      return returnVal;

   }

}

Note that IE uses contentWindow, Opera uses contentDocument and Netscape uses either...

Cheers!

AHA! There is try/catch in Javascript!! WOOHOO!
You have just done me an unimaginably large favor, you have literally opened up worlds before me! Thank you!

Yes, at least from JavaScript 1.5 there is "try catch".
Take a look here: http://www.devshed.com/Client_Side/JavaScript/JavaScript_Exception/page1.html
For more info.
/DAn

{cell 260}
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