Asp.net Menu open submenu on click not on hover

Question

Is there any way to force asp.net 3.5 menu control to open submenues(menuitems) on mouse click, not on hover.

I beleive it can be done with javascript or maybe jQuery, because when I click on menuitems postback ocures even if there is no navigation url.

I found some javascript function but it only opens root items on click, deeper items are still opened on hover.

that code can be found here http://msd-bml.blogspot.com/2008/09/aspnet-menu-click-instead-of-hover.html

I would still prefere if it can be done with server code, not javascript. Using other control is not an option, for now.

Any ideas or sugestions?

Tnx!