Thanks for the reply. I installed and while using the websplitter control i am facing the following issues..
It sounds like some of the custom controls you're embedding inside of the splitter pane is likely causing the problem.
The best bet is to try removing some of the content and see if you can find which control is causing the problems.
I am using the websplitter and in two webpart zones in it. Each webpart zone loads some 7 custom/user controls. While resizing with the splitter the websplitter have to runat server and again the loading of controls has to happen. This is not allowing to move the websplitter freely . Any way of simplifying that such as runat client level. Give some suggestions please.