Typical 做法:
http://stackoverflow.com/questions/136458/how-do-i-with-javascript-change-the-url-in-the-browser-without-loading-the-new
用 hash-hack #

HTML5 做法:
http://spoiledmilk.dk/blog/html5-changing-the-browser-url-without-refreshing-page
window.history.pushState(“object or string”, “Title”, “/new-url”);