学习链接

http://www.jb51.net/css/154125.html

http://www.chinaz.com/design/2010/1229/151993.shtml

http://blog.csdn.net/yanzhibo/article/details/18517917

http://www.jbxue.com/article/8364.html

http://www.sitepoint.com/web-foundations/css-box-model/