本树型菜单采用的是用xmlhttp进行异步加载数据，与服务服可以相对隔离，服务端只根据条件生成xml数据，用xsl分析数据并显示。
the tree menu is the xmlhttp for asynchronous data loading, and services can be isolated from the service, the server only under conditions xml data generated using xsl analysis of data and display. (2007-04-27, JavaScript, 16KB, 下载12次)