save and load browse window / tab layouts

Question

I have a large web application where the user will setup many browser tabs and browser window layouts. For example, having 2 windows open vertically next to each other.

I need a way to save it and then load it later.

So from analysis i need to: 1. Detect what bwoers tabs are using a certain URL. 2. Detect their position. 3. then save it as XML.

then i can hopefull also load it back to the same state using xml.

And i need it to work for different browsers, but only windows for nwo.

any ideas ?