I have three Frames on my ASPX page. One on the top and one on the left and one on the right. Left side frame has some hyperlink options, when clicked, open a page in the right side frame. Somewhat like MSDN library. But what I do not have is MSDN like Drag-Drop thing on the frames. So I cannot resize my left side Frame by dragging its border and resizing it. Anybody knows how to do this ?