It seems to me that 95% of the examples you have and code you supply contains client-side javascript. This is not surprising, of course, because Telerik has created a great and powerful client-side API for most of its controls. However, shouldn't the demo you provide at:
http://demos.telerik.com/aspnet-ajax/ajax/examples/common/loadingusercontrols/defaultvb.aspx
contain a BIG warning message telling developers that this functionlity won't work if your user controls contain javascript? Unless Telerik has come up with some sort of solution recently, it is my understanding that you can't load Usercontrols containing javascript with AJAX and expect the javascript to function properly (ie load along with the rest of the usercontrol).
http://demos.telerik.com/aspnet-ajax/ajax/examples/common/loadingusercontrols/defaultvb.aspx
contain a BIG warning message telling developers that this functionlity won't work if your user controls contain javascript? Unless Telerik has come up with some sort of solution recently, it is my understanding that you can't load Usercontrols containing javascript with AJAX and expect the javascript to function properly (ie load along with the rest of the usercontrol).