JavaScript DHTML examples (example source code) Organized by topic
一个非常好的JavaScript DHTML 代码下载网站，分类详细，还是免费http://www.java2s.com/Code/JavaScript/CatalogJavaScript.htm
又一个强站，提供超强的绘图代码，可以实现复杂的数学绘图。当然也有很不错DHTML, JavaScript
http://www.walterzorn.com/index.htm
WZGrapher Function Graphing and Math Program
Quick Function Graph Plotter with small footprint.
Additional features: numerical integration and derivation, numerical solution of ordinary differential equations (ODE) up to the fifth order. Scrolling and zooming the displayed range, copying graphs into other applications, saving your work as WZG files. The most important actions can even be done with Mouse Gestures. Built-in function calculator and numerical differential equation ( ODE ) solver which can generate value tables including the first derivative values.
Despite these and more features, the size of WZGrapher is just 100 KB, download size 114 KB. Written in C language.
Web Development: Advanced DHTML, JavaScript
Web Development: Advanced DHTML, JavaScript 终于有国人的网站了，是一个资源类网站，东西挺多的，下了一些。
http://www.knowsky.com/
Snippets is a public source code repository. Easily build up your personal collection of code snippets, categorize them with tags / keywords, and share them with the world
http://www.bigbold.com/snippets/
写在后面：发现JS原来是这么强大，真的是学无止境啊！