redirect to app store if registered protocol is not available

gistfile1.js

    var iDeviceRedirect = function( url, appPath )
    {
      if ( url )
      {
        window.mobileDetected = true;
        // for iDevice, we do redirect on document load.
        // After redirect, if our script is still running,
        // that means that the redirect failed. We then
        // show a dialog box asking to download the app
        window.onload = function()
        {
          var noAppMessage = 'You do not seem to have Insider installed, do you want to go download it now?';
          MobileDetect.redirect( url );
          setTimeout( 
            function()
            {
              if ( confirm( noAppMessage ) )
                MobileDetect.redirect( appPath );
            },
            300
          );
        }
        
        showMobileAppDownload( appPath );
      }
    }

// here's MobileDetect.redirect, no brain surgery required
  var redirect = function( url )
  {
    try
    {
      location.href = url;
    }
    catch(error)
    {
      return true;
    }
  }