[jQuery] Specifying user agent with ajax

[Yansky]

Hi, how do I go about specifying the user agent when I'm using ajax in
jQuery?

I've tried

 $.get("test.html",
   { data: 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:
1.8.1.3) Gecko/20070309 Firefox/2.0.0.3' },
   function(data){
     $('#testDiv').append(data);
   }
 );

and

 $.get("test.html",
   { User-Agent: 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:
1.8.1.3) Gecko/20070309 Firefox/2.0.0.3' },
   function(data){
     $('#testDiv').append(data);
   }
 );

but I don't think either of those are working.