How can I trigger on URL change in jQuery?

How can I trigger a function when the URL changes? I try something like:

$(windows.location).change(function(){
   //execute code
});

So my URL is something like http://www.mysite.com/index.html#/page/1. How can I execute jQuery or JavaScript code when the URL becomes something like http://www.mysite.com/index.html#/page/2?