User Profile edits 1

*First attempt adding AJAX actionlinks to user profile sub-menu
*Trying to show/hide multiple partial views (marks, collections, etc)
within the same main View asynchronously (AJAX) without reloading the
page each time.
*Tried replacing DIV content via ID targetting and HTML.Partial call
*Receiving a 'Object reference not set to an instance' error
*Do i add hard-coded List of Marks/Collections to the User Controller as
per Collections in order pass to the ViewModel + Partial view?