Get dashboard parent URL from iframe

[sbjerre]

I've made some programming in .NET that i have to implement to a Sharepoint 2001 solution.

The .NET programming is placed on a dashboard using a Content Viewer (iframe), but I need to know the URL of the dashboard....

I've tried with the following javascript:

alert(window.parent.location);
alert(parent.document.location.url);

but in boths cases i got an javascript error:
'Access is denied'

How can i get the parent URL an iframe within a sharepoint 2001 dashboard?

Thanks

Soren Bjerre, Denmark