I am using Flot to graph some of my data and I was thinking it would be great to make this graph appear fullscreen (occupy full space on the monitor) upon clicking on a butt
When you say "full-screen", do you mean like full-screen for the computer, or for taking up the entire space in the browser?
You can't force the user into full-screen F11; however, you can make your div full screen by using the following CSS
div {width: 100%; height: 100%;}
This will of course assume your div is child of the tag. Otherwise, you'd need to add the following in addition to the above code.
div {position: absolute; top: 0; left: 0;}