Keep "lava" stationary in jQuery LavaLamp on submenu hover

In http://mercedesrepairfountainvalley.com/staging/mercedes-brake-repair-fountain-valley-mercedes-clk-350.php I am trying to keep the “lava” in place over “Services” when I hover over anywhere in the sub-menu. But when I hover there the lava then wants to move to the far left of the UL. Any thoughts?