Is the current page (the page from which you showed the Javascript code) on the exact same server as the requested information? So has the current page been served from
http://win2012svr:8080?
If not, you will most probably get a security exception because of violation of the same origin policy of your browser.
If you have full access to this server you could set the response header to allow other origins. In PHP for example you can do it like this (if the current page is from
http://www.example.com)
Code:
header('Access-Control-Allow-Origin: http://www.example.com');