Please, try the following jQuery solution, where RadMenu1 is the ID of the menu:
'mouseout for the menu'
Note that you have to bind the mouseleave instead of mouseout. The difference between the two events is explained in detail in the following links:
the Telerik team
Watch a video
on how to optimize your support resource searches and check out more tips
on the blogs.
Follow the status of features or bugs in PITS
and vote for them to affect their priority.