javascript:void(window.open(Destination,’_blank’))

My preferred method is to wrap this up into a custom code function such as

Function OpenURL(ByVal URL As String) As String
Return “javascript:void(window.open(‘” & URL & “‘,’_blank’))”
End Function

In your report, you can then just set the navigation property to jump to a URL of a website:

=Code.OpenURL(“http://www.purplefrogsystems.com“)

Or to the path of a the drillthrough report:

=Code.OpenURL(“http://[Your Server]/ReportServer?/Folder/ReportName&rs:Command=Render”)

If you have parameters that you need to pass in, you can add these into the URL either fixed or dynamic:

=Code.OpenURL(“http://[Your Server]/ReportServer?/Folder/ReportName&rs:Command=Render &MyFirstParam=Value1&MySecondParam=” & Fields!MyField.Value)

Please note that this will not work in the BIDS development environment, it will only work once you have deployed the report to the Report Server.