I just removed the erroneous script and managed to reproduce the problem: I was unable to move the RadDock controls from the zone (they automatically return to their original position) if I drag them below
the zone. If they are dragged above
the zone, they stay in their new position. This is a known problem in RadDock, caused by the browser: when a dock object is dragged and dropped somewhere on the browser window, the drag-drop script searches for a HTML element where the dock control was dropped on. In Standards mode (when the page has a DOCTYPE) when the page content is small (as in the sample) the browser reports that there is nothing under the last HTML element, which is actually the place you are dropping the dock control, hence it returns in its original position. To resolve the problem you need to put more content on the page, so it fills the whole browser window, or set height 100% to the body, the form and the html elements on your page.
Valeri Hristov (Senior Developer, MCSD)