RacketDrawingToolkit.js

A javascript implementation of the Racket Drawing Toolkit.
Implements:

region%
dc% [Run Tests] - fillStyle "odd-even" is only supported on Mozilla 7+
dc-path%
bitmap%[Run Tests] - bgcolor is currently ignored, and images can only be saved as PNG and JPG
bitmap-dc% [bind a bitmap-dc%, to bdc]
brush-list%, brush% [Run Tests]
font-list%, font% [Run Tests]
color-database%, color%
radial-gradient%, linear-gradient% [Run Tests]
pen-list%, pen% [Run Tests] (dashed/dotted line stroking only works on browsers that support it - FF8+ and Webkit Nightly)
point%

Feel free to try out the API manually:
Open a javascript console, and refer to functions of the context object. For example, if you'd like to use the draw-rounded-rectangle function, you would type context.drawRoundedRectangle(0,0,100,100,30). Any input that requires a list (new LinearGradient(), for example) should instead be passed a javascript array. Colors are passed as color% objects. Images are passed as bitmap% objects. For examples of API calls, see tests.js for details. Any contexts you add (through new dc() or new bitmap_dc()) can be bound to a variable, and their canvas can be added to the document through normal DOM methods document.body.appendChild(context.canvas).