Creating webpages with Excel Web App mashups
Demo of an embedded Excel Web App responding to form controls
Edit the values in the two textboxes and click the Update Chart button
to update the Excel Web App!
Remember to use the decimal separator that belongs to your windows country setting. If the chart stays blank, try using the dot instead of the comma or vice versa.
The next page shows a demo where I used an event to create a dynamically updating chart.