This sample page shown how to implement a form with fields that can be changed by the user without a need for a submit button. The values on the right as well as the graph at the bottom will be calculated and displayed with only a small delay.
If this graphic is not shown at once but is assembled slowly line by line, it's because of an IE bug. Just reload the page and try again. It can be fast!
Also have a try to the error handling when entering a non numeric value into the amount field...
This page is part of the http://ajaxaspects.blogspot.com/ project.