1. When the treeview is using serversidecallback load-on-demand - you do not need to use RadAjaxManager - the treeview will make ajax callbacks automatically to the server and the page will not refresh.
2. I meant the client-side pageLoad()
method. The function with this name will be executed right after the Sys.Application.load
event and this guarantees that all the scripts have been loaded and the objects have been created and initialized. More information is available here
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