RadMenu for ASP.NET AJAX

RadControls for ASP.NET AJAX

You can have your menu cause postbacks to a different Web page from the one that contains it. Simply set the PostBackUrl property to the page that should handle the postback.

CopyASPX
<telerik:RadMenu ID="RadMenu1" runat="server" Skin="Default" PostBackUrl="CrossPageCS.aspx"
    OnItemClick="RadMenu1_ItemClick">
</telerik:RadMenu>

Once in the second page, you can access the menu (or any other control) on the previous page using the Page.PreviousPage property.