[support] jQuery.ajax returns 404

[Scott]

I'm still experimenting with a new citysearch module.  I've managed to
fetch back the json with curl but I'd still like to let ajax handle it.
I have this function but it reports a 404 error.  Is there a way to
determine the url value actually being sent?  The generated value I'm
using here works both with window open() and with my curl function.
My code:

function processSearch(form) {
  var what = js_trim(form.what.value);
  var where = js_trim(form.where.value);
  var loc = js_trim(form.location_or_event.value);
  var publisher = js_trim(form.publisher.value);
  var api_key = js_trim(form.api_key.value);

  var URL =  'api2.citysearch.com/search/'+loc+'?what='+what
+'&where='+where+'&format=json&publisher='+publisher
+'&api_key='+api_key;

alert(URL);
$.ajax({
  type: 'get',
  url: URL,
  dataType: 'jsonp',
  success: function() { alert("Some success"); },
  error:function (xhr, ajaxOptions, thrownError){
                    alert(xhr.status);
                    alert(xhr.statusText);
                    alert(xhr.responseText);
                }
}); // end ajax method
}

function js_trim(str) {
  return str.replace(/^\s\s*/, '').replace(/\s\s*$/, '');
}