Need DIV to slide in onclick

Need DIV to slide in onclick

Hi all

I need something to help me slide in a DIV from the right hand side of my screen. 

I have the DIV which is positioned absolutely, 400px wide, with a negative RIGHT position so the DIV contents are hidden off screen.  When I click the button attached to the DIV (which is just showing in my window), I need the DIV to slide in X pixels to the left.

I have tried using jquery slide() but it doesn;t slide the DIV into my view, it just slides the div contents into the area my button is placed.

Any ideas on how to get a DIV to slide in?

Thanks