Request address in JavaScript
 Possible Duplicate:  
 Get current URL with JavaScript?  
How do you get the address of the page you are on in JavaScript?
 For example, if I had a script at somesite.com/javascript/home.html and I want to find out the request address ( somesite.com/javascript/home.html ), how do I get this information in JavaScript?  
 You need to use: document.location or window.location  
You can read more here. Or there is a little more explanation over there.
For clarifying matter:
Originally Posted by Mozilla Developer Center
document.location was originally a read-only property, although Gecko browsers allow you to assign to it as well. For cross-browser safety, use window.location instead.
window.location.href;
or
location.href; 
 window is the global object, so location.href will be identical to window.location.href and NOT document.location.href (as long as there's no enclosing function or with statement which shadows the property)  
你在找什么是window.location.href 。 
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