How to move the scroll of a div on keydown of listbox contents

I am having a listbox with large contents. I have used a div outside the listbox (no fixed height and width set)with a fixed width and height sot开发者_如何学运维hat the div is having both horizontal and vertical scroll. The list box within the div does not have any scroll. The div will not scroll down when i use key down for the listbox inside it. I want to move the scroll of the div according to the listbox key down. Can any one give a solution for this