title: Synchronous cross sub-domain POST request with jQuery
body: <p>I'm trying to do a cross domain POST request and have hit a wall (or two).</p>
  
  <p>I can't put a proxy page on the server - so that is not an option.</p>
  
  <p>I have researched getJSON, which works great except that I need to POST not GET.</p>
  
  <p>Is it possible to do this? If it is <em>not</em>, can someone explain to me how getJSON works and why I cannot make a POST alternative.</p>