Currently my webpage is divided in two frames:
1) The left frame contains a navigation tree
2) the right frame shows information and/or graphs that corresponds with the tree node that is clicked in the left frame.
Now, since I want to have my whole screen available for showing the information, I want the left frame to be "slidable".
So, by default that tree navigation frame is "invisible" except from some small 5 à 10 pixel column indicating the frame is available there. When the user needs the tree to navigate, he hoovers with the mouse over the 5 à 10 pixel column (or clicks on it) and the navigation frame "slides in" from the left.
When you click on the tree the information frame (partly behind the navigation frame) is updated.
When you want to see the information "in full screen" again, you click somewhere (on a link?) in the navigation frame and the frame slides away again.
, but then for frames.