Jquery $.get in IE9 - ajax

Question

Any idea why this does not work in IE9 but does in Chrome and Firefox?
$.get("http://nominatim.openstreetmap.org/search", { format: "json", q: val, polygon: 0, addressdetails: 1 })
.done(function(results) {
if (!results) return;
// do something
});
I know IE8 wont support it but i thought 9 would?
Update:
New code
$.ajax({
type: 'GET',
url: "http://nominatim.openstreetmap.org/reverse",
data: { format: "json", lat: lat, lon: lng, zoom: 18, addressdetails: 1 },
error: function(xhr, status, error) {
myTable.fnUpdate("Not supported by browser", aPos[0], 4);
},
success: function(data){
myTable.fnUpdate(data.display_name, aPos[0], 4);
}
});
At least with this i can show "Not supported by browser" rather than nothing happening, are there no tricks to make it work in IE9?
Update 2:
This seems to work in FF, Chrome and IE9.
http://jsfiddle.net/BXhkm/4/
But when i add the same code to my app the first request is successfull, then i get Error: data was not called.

Answer 1

To solve cross domain issues, you need to read the documentations of the Server API and the one of jQuery.
If the browser/framework does not support cross domain requests via GET or POST you need to fallback to JSONP requests.
Wiki docs of Openstreetmap Nominatim:
json_callback=<string> Wrap json output in a callback function (JSONP)
This tells you that the parameter that defines the callback function is json_callback
Now you look at the docs of your framework:
jQuery.getJSON
section JSONP
If the URL includes the string "callback=?" (or similar, as defined by the server-side API), the request is treated as JSONP instead. See the discussion of the jsonp data type in $.ajax() for more details.
This tells you if you include a paramter in your request url and that has the value ?. This ? is replaced by the callback method for the JSONP request.
Out of this two informations you create this query:
$.getJSON("http://nominatim.openstreetmap.org/reverse?json_callback=?",
{ format: "json", lat: lat, lon: lng, zoom: 18, addressdetails: 1 },
function(data) {
console.log("success");
});
Instead of getJSON you can for sure use ajax the important part is that you do a jsonp request.
EDIT
The first ? marks the beginning of the parameter list, the second ? is the placeholder for the jsonp callback.
http://nominatim.openstreetmap.org/reverse?json_callback=?