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I am trying to make autocomplete control working using XHRDataSource . I am using the following example
http://developer.yahoo.com/yui/examples ... quest.html
Here is my Json format
{"ResultSet":{"totalResultsAvailable":2,"Result":[{"cityId":1,"houseId":3,"houseType":1,"position":1,"streetId":1,"zipId":1,"title":"130021|130022"},{"cityId":1,"houseId":4,"houseType":1,"position":2,"streetId":1,"zipId":1,"title":"130022|130023"}]}}

It is working fine in all servers when html page and serverside page(PHP script) on same server or same domain.
If I put the html file on a sub domain and try to access php file on another subdomain in same domain, It is not working (Only in Firefox )

It is fworking fine in all IE versions. right now I am using FF 3.5

Could somebody please help me

My sample code is pasted below
<script type="text/javascript">
YAHOO.example.CitySearchRequest = function() {
// Use an XHRDataSource
var oDS = new YAHOO.util.XHRDataSource("http://l1self32.oskarmobil.cz/~xrenpill/whisperer/fe/www/get_json.php");
// Set the responseType
oDS.responseType = YAHOO.util.XHRDataSource.TYPE_JSON;
// Define the schema of the JSON results
oDS.responseSchema = {
resultsList : "ResultSet.Result",
fields: ["title", "position", "cityId"]
};

// Instantiate the AutoComplete
var oAC = new YAHOO.widget.AutoComplete("txtCity", "cityContainer", oDS);
// Throttle requests sent
//oAC.queryDelay = .5;
// The webservice needs additional parameters
oAC.generateRequest = function(sQuery) {
return "?method=getCityList&cityId=1&query=" + sQuery ;
};
oAC.itemSelectEvent.subscribe(function(type, args) {

var selectedValue = new String(args[2]);
var splitResult = selectedValue.split(',');
var selectedString = splitResult[0];
var selectedStringPosition = splitResult[1];
var selectedStringId = splitResult[2];
document.getElementById('cityId').value=selectedStringId;

/* this line works around Opera's preventDefault
bug: */
YAHOO.util.Dom.get("searchsubmit").disabled = true;
});
return {
oDS: oDS,
oAC: oAC
};
}();
</script>

In YUI Library example they are claiming XHRDatasource can be used for remote data, that means same orgin policy is not applicable here.

I resolved by problem by using ScriptNodeDataSource instead of XHRDstssource

Thanks a lot for your time..