Dashboard plugin -- switching dashboards

Excellent Dashboard plugin:
http://connect.gxsoftware.com/dashboardplugin/demo/dashboard.html

for asp.net Application
you just need to add MIME Type for .json file
add following line in web.config

  <system.webServer>
    <staticContent>
      <mimeMap fileExtension=".json" mimeType="application/json"/>
    </staticContent>
  </system.webServer>