是关于鼠标的源码，读完这段代码之后，你大概就清楚平时的监听是如何实现的。-On the mouse source code, read this code, you probably became clear how the usual monitoring achieved.

jdbc和ajax技术实现对无限级联分类的实现,一段不错的 源码，值得参考-jdbc and ajax technology to achieve the realization of the infinite cascade, a good source, it is also useful