Resizing

Hey,
Does anybody know of a script or an extension that makes it so that when
the window is resized the background in the main frame is resized with it?

Ex.
Minimized frame:
----------------------------------------------------------------------------
---------------

|

|
Frame is resized |


|

|

|
_______________________________________| |




This is the size of the picture





__________________________________________________ ______

I would like the full picture to be displayed in the resized frame

Thanxs