ajax+history.pushState简单实现页面不跳转刷新

http://jser.me/2015/03/10/ajax+history.pushState%E7%AE%80%E5%8D%95%E5%AE%9E%E7%8E%B0%E9%A1%B5%E9%9D%A2%E4%B8%8D%E8%B7%B3%E8%BD%AC%E5%88%B7%E6%96%B0.html