About Random iframe content !! Help me

[winpeace]

http://www.dynamicdrive.com/dynamicindex17/randomiframe.htm
I use this code.But I want something
How to I fixed this code.
I want when I pull scrollbar This frame(my content) must befixed

like this;
http://www.dynamicdrive.com/dynamicindex14/bgslide.htm

I am sorry my bad english :(

[winpeace]

I add this code;

<style type="text/css">

#dynstuff {
position:fixed;
}

</style>

ie7 and mozilla fixed ok
but ie6 not fixed.