A quick experiment in drawing dynamic graphs using the HTML5 Canvas tag. Sliders generated with jQuery UI for a quick result. Script written using jQuery for speed and efficiency but can be easily adjusted to any other framework.
View the source for the HTML and click here for the JS.
Play with the sliders to change the graphs.
Note: This will only work in compatible browsers. I have been exceptionally lazy and not accounted for incompatible browsers (well it is just a quick test), so if it doesn't work for you sorry! It definitely works in Firefox 3.