Setting mouseover parameters

Setting mouseover parameters

I want to alter this jquery script so that when you mouseover the menu item, then the sub-menu appears. If you simply replace "click" with "mouseover" then the menu appears with a mouseover but disappears as soon as you mouseout of the menu_head. I need the menu to still stay in place when the mouse is over menu_body also.

The script is here

http://www.clarklab.net/blog/posts/animated-drop-down-menu-with-jquery/

Any help much appreciated.