To answer your questions - first considering the RadTabStrip and the MegaDropDownMenu and then the RadSitemap:
1. Since the RadSiteMap is created in a way so that the user can always
keep track on the current page and the hierarchy of the pages in a web
site you probably refer to a scenario containing a RadSiteMap in a combination with RadTabStrip and a RadMultiPage control. If this is the case I would suggest that you refer to the following articles that might give you a better understanding how this would be accomplished using the highlightpath() method.
If not, can you provide some markup of the scenario you need to accomplish or a screenshot for better understanding?
2. In general we do not have server-side events that you can use with the RadSiteMap control except for the NodeDataBound
one. Since the main concept of this control is to navigate a user through a web site it is designed in a way to be a relatively light control. If you need to use any other events to further customize its functionality you can choose between making use of the jQuery libraries or switching to a different control (that might fit your scenario better). However, there is also a way to attach a click event to the RadSiteMap as described in the forum post below:
the Telerik team
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