In this example an image is updated repeatedly in real-time. A JavaScript script program in the web page implements an interval timer and communicates with the server creating the image. The image will update 30 times each time the Start Updates button is clicked. This application require significant bandwidth and may not update properly if you have a slow internet connection.

The TrackBar and Button controls at the right of the image are for display only. Since this is a JPEG rendering  by an ASP .Net application running on the server, the controls are just bitmap representations of the underlying controls.