参考以下文章:
http://www.zdnet.com.cn/developer/code/story/0,2000081534,20027648,00.htm
http://www.code365.com/html/data/20040303/index/20043314287.html
http://www.zdnet.com.cn/developer/code/story/0,2000081534,20027648,00.htm
http://www.code365.com/html/data/20040303/index/20043314287.html
上面提到的2个网址。此问题已结帖。