jquery 事件委托三种事件绑定方式.bind(),.live(),.delegate()

http://www.ituring.com.cn/article/467#

http://www.cnblogs.com/lvdabao/archive/2013/08/30/3290603.html

http://developer.51cto.com/art/201103/249694.htm

http://www.cnblogs.com/dumuqiao/archive/2011/09/09/2172511.html 非常好