从Javascript更改URL，如Facebook做
我目前工作在一个面向AJAX的web应用程序。我一直在寻找复制当前AJAX状态的不同方式（或应用程序状态）与浏览器的网址，以便刷新和返回按钮也适用。
I'm currently working in a AJAX oriented web application. I have been looking for the different ways of replicating the current AJAX state (or Application state) with the browsers url so refreshing and back-button also works.
在过去的几个星期我看到涉及使用散列（＃）和不同的JS-框架不同的方法。
In the last weeks I see different approaches involving the use of the hash (#) and different JS-frameworks.
在文档中指出，该改变从JS浏览器的URL是不可能的。今天我去Facebook和打开图像和URL变化（Altough图像是在一个收藏夹打开）。后的图像被关闭时，浏览器的URL改回原来的页面。
In the documentation it is stated, that changing the browsers URL from JS is not possible. Today I went to Facebook and opened an image, and the url changed (Altough the image was opened in a lightbox). After the image was closed, the browser url changed back to the original page.
你有什么想法，他们是如何做到这一点的行为呢？
Do you have any idea how they achieve this behavior?
您可以操纵在这样的URL的末尾有值：
You are able to manipulate the has value at the end of the URL like this:
var hashVal = 'somevalue';
window.location.hash = '#' + hashVal;
然后是网址将成为 www.something.com/#somevalue