I am working on a project where there is an almost impossible requirment.
The requirmwnt is to keep a silverlight and a flex webapps (iframes) alive.
By alive I mean that they will not get refreshed from page switch or any kind of change to the page.
I managed to do so by placing them outside the frame that gets the page switch, but it makes it so that when there is a scroll the iframe holding the flex / silverlight will go above other frame as we scorll up or down.
Z index does not help as the iframe is above the other frames and just relocates itself with Java script.