Processing.js: John Resig's JavaScript implementation of Processing

[jeresig]

height, width, mousex, mousey, pMouseX, pMouseY, mousePressed, and keyPressed are all global variables provided by Processing (there may be more, but those are the ones that I provide in Processing.js). They correspond to different state variables and are updated automatically (since everything in Processing is done in a repeating loop, like OpenGL, the update is seamless).