menu issue on IE

Hi everybody,
This is a strange one, and have spent hours looking at it, and cant find a solution. Make me think its something dumb and simple I have done.

I have the following page . (short url to stop google indexing this thread with the website)

Basically, when I mouse over the menu items on Firefox and Chrome, all works fine. But on IE, when I mouse over the menus, and try to select the sub items, then the menu disappears.

I’ve checked on Firebug, and no warnings are showing.

A JS expert might see the dumb thing I have done straight away.

Thanks in advance.

The first step is to find out if anyone else has solved the same problem.

Where did you obtain the code for the menu from?

I have it sorted now, thanks