box2d 教程

http://www.linuxgraphics.cn/physics/box2d_js_overview.html

http://www.box2dflash.org/docs/2.0.2/manual

http://creativejs.com/2011/09/box2d-javascript-tutorial-series-by-seth-ladd/

http://wenku.baidu.com/view/afe0fab069dc5022aaea001f.html

http://www.cnblogs.com/jinglehit/archive/2012/01/05/2313115.html