Hide scrollbar

does anyone know if there is a way to hide the scrollbar from windows, but keeping the ability to scroll with the mouse' scrollwheel?

i know there are scripts for hiding the scrollbar in IE, but they usually wont work in other browsers..

thanks in advance

i would like to do that, because:
i have a menu in my website which can expand in such a way that it will apear outside the window
so: i want to keep the scrolling function, but remove the scrollbar
this will people will be able of scrolling but wont see a scrollbar

i want to remove the scrollbar because it "messes up" my menu: you can find the menu [url=http://coreper.110mb.com/prototype/index.htm]here[/url] [note: this menu DOES NOT work like it is supposed to: it is just a prototype {links open wrong when clicked}, so please dont tell me they dont work properly]

EDIT:
how  does the overflow command work?

Frames are horrible, you may be better using Ajax to load in your element contents instead.

Otherwise Add this css to the left menu frame document head
<style type="text/css">
html{
overflow:hidden;
}
</style>