jquery阻止冒泡和阻止默认事件
event.stopPropagation();
event.preventDefault();
http://www.cnblogs.com/qixuejia/archive/2013/10/10/3362318.html
event.stopPropagation();
event.preventDefault();
http://www.cnblogs.com/qixuejia/archive/2013/10/10/3362318.html