Google has supported graphing functionality on their search engine for a while now.
Just type any real two variable function into Google to see a dynamic, interactive, three dimensional plot. Click anywhere in the graph to rotate it to check out different angles, or scale the view by zooming in or out, or by editing the range in your equation or in the lower-right legend box. For example, if you’re a student studying advanced calculus, the ability to see a three dimensional graph will help you get a better visualization for real two variable functions.
Google is using WebGL for the generated results. This is the first time Google Search itself is using WebGL though it is used in other Google services like Maps.
Internet Explorer does not support WebGL, so you get an error message there.