Change local mode (file://c:/whatever) to localhost mode (http://localhost/whatever) – requires symbolic link in server's htdocs folder.

Localhost mode

var url = document.URL,
	currentLocation = url.split("//"),
	newURL = "",
	path = "";
if(currentLocation[0] == "file:"){
    path = url.substring(11, url.length);
	newURL = "http://localhost/" + path;
}
document.location = newURL;

Minified version:

var u=document.URL,l=u.split("//"),U="",p="";if(l[0]=="file:"){p=u.substring(11,u.length);U="http://localhost/"+p}document.location=U;

This is useful as a bookmarklet, just add javascript: before the minified code, and add the whole thing as the URL to a new bookmark in your browser.