http://www.blog.edu.cn/user2/26250/archives/2005/292766.shtmlhttp://www.baidu.com/s?lm=0&si=&rn=10&ie=gb2312&ct=0&wd=%B9%FE%C0%FB%B2%A8%CC%D8+%D4%DA%CF%DF%D4%C4%B6%C1&pn=10&cl=3
看看吧