Submenu not clickable in IE9

On my website http://www.mvl.eu I used superfish for a submenu. The submenu IS visible (z-index problem), but is is not clickable, because it disappears if you move t开发者_开发百科o the sublinks. This problem only happens in IE9, until IE8 there was no problem. Can someone please tell me what the problem is, because i'm pretty out of ideas. Thanx!

Having just checked your website, I can confirm this is also an issue on IE7, unless you move the mouse down fast enough. Looks like there is some kind of gap between the definition of the menu title, and the menu items. Perhaps the issue is when the mouse is in this gap?

Thanx for the help. Let me partly answer my own question. The problem in IE9 is that all the javascript / Jquery elements on my website don't work anymore. The superfish submenu had a little gap between the link and the submenu, but in javascript there was a delay of a second before the menu disappeared, enough to cross the little gap. Without javscript the delay was 0 sec, so as soon as you entered the gap with the mouse, the submenu disappeared. I positioned the submenu right next to the link so the problem is fixed and the menu works even with javascript disabled. The real question is why these javascript / jquery elements like lightbox, superfish and nivoslider don't work in IE9.