var obj;



function fillSelect(host, obj, fk_value, form){



	this.obj = obj;



	resetSelect(obj);



	// check if object exisits.

	if(typeof obj != 'object') return false;



	if(obj.name == "state_id"){

		resetSelect(form.region_id);

		url  = '/location.php?country_id=' + fk_value;

		if(fk_value > 0) loadResult(url,'');

	}



	if(obj.name == "region_id"){

		url  = '/location.php?state_id=' + fk_value;

		if(fk_value > 0) loadResult(url,'');

	}

}



function resetSelect(obj){

	while (obj.options.length>1) {

		deleteIndex=obj.options.length-1;

		obj.options[deleteIndex]=null;

	}

}



function loadXMLDoc(url) {

	// branch for native XMLHttpRequest object

	if (window.XMLHttpRequest) {

		req = new XMLHttpRequest();

		req.onreadystatechange = processReqChange;

		req.open("GET", url, true);

		req.send(null);

	// branch for IE/Windows ActiveX version

	} else if (window.ActiveXObject) {

		req = new ActiveXObject("Microsoft.XMLHTTP");

		if (req) {

			req.onreadystatechange = processReqChange;

			req.open("GET", url, true);

			req.send();

		}

	}

}



function processReqChange() {

	// only if req shows "complete"

	if (req.readyState == 4) {

		// only if "OK"

		if (req.status == 200) {

			// ...processing statements go here

			response  = req.responseXML.documentElement;

			if(response) {

				var result = new Array();

				for(i=0; i < response.getElementsByTagName('id').length; i++){

					result[i] = {'id': response.getElementsByTagName('id')[i].firstChild.data, 'name': response.getElementsByTagName('name')[i].firstChild.data};

				}

				loadResult('',result);

			}

		} else {

			alert("There was a problem retrieving the XML data:\n" + req.statusText);

		}

	}

}



function loadResult(url, result){

	if (result != ''){

		// Response mode

		for(i=0; i < result.length; i++){

			this.obj.options[this.obj.options.length]  = new Option(result[i].name,result[i].id);

		}

	} else if(url != '') {

		// Input mode

		return (loadXMLDoc(url));

	}

}