It looks like you have bumped into the same origin policy. You have to use a relative path for the load()
method, otherwise most browsers will simply return an empty responseText
.
As one possible workaround, you could set up a very simple reverse proxy (using mod_proxy if you are on Apache). This would allow you to use relative paths in your AJAX request, while the HTTP server would be acting as a proxy to any "remote" location.
The fundamental configuration directive to set up a reverse proxy in mod_proxy is the ProxyPass. You would typically use it as follows:
ProxyPass /ajax/ http://someurl.com/
In this case, the browser would be requesting /ajax/default.aspx
but in fact the server would serve this by acting as a proxy to http://someurl.com/default.aspx
.
If you are using IIS, you may want to use the Managed Fusion URL Rewriter and Reverse Proxy to set up a reverse proxy.