No, there is no JavaScript error.And also no error in the Event Log of DNN?
I don't think that my code and the Code of the Page Management are the same. The only thing thats the same is that both using the DNNTreeview (RadTreeView).
Ether there is something wrong with the Telerik Controls, or there are problems with the JavaScript on the site which conflicts with the tree View Script.
Any chance you could send me login data for your sites (via Mail), to take a look at the site? Otherwise the only option left for would be to replace the Rad Control with a Standard Control, then we would know if that is the problem.