1、CSS设计 http://www.w3cplus.com/

2、固定页脚 http://ryanfait.com/sticky-footer/

3、固定页脚 http://matthewjamestaylor.com/blog/keeping-footers-at-the-bottom-of-the-page

4、固定页脚 http://www.w3cplus.com/css/css-sticky-foot-at-bottom-of-the-page