Little independent applications

[eluser]breaddes[/eluser]
I looked into some of that solutions but I have a basic problem with all of them.

If I have a link on that independent widget I want to point it only to the widget itself. Let's say I have a link that gives further information:

Code:

<a href="widget/givefurtherinformation">Call</a>

It's clear that this will not run within a closed widget (except javascript + ajax). It will redirect the Browser to that link which I don't want actually. I only want the widget to change. The rest of the site should maintain as is.

What are ways to manage that? I want to call the same site again, but let the widget know that it needs to do something else.

I appreciate any help or ideas!!