var Ajax = new Object();
//var ParentID = 'proizvodjac_id';
//var ChildID = 'model_id';
//var chooseValue = '0';
//var chooseCaption = 'Izaberite model';
var ChildID;
var chooseValue;
var chooseCaption;

Ajax.Request = function(url, id, callbackMethod, ControlID, OptValue, OptCaption)
{
	ChildID = ControlID;
	chooseValue = OptValue;
	chooseCaption = OptCaption;
	
	Ajax.request = Ajax.createRequestObject();
	Ajax.request.onreadystatechange = callbackMethod;
	Ajax.request.open("POST", url + id, true);
	Ajax.request.send(url);
	//alert(url + id);
}

Ajax.Response = function ()
{
	if(Ajax.CheckReadyState(Ajax.request))
	{		
		document.getElementById(ChildID).length = 0;
		document.getElementById(ChildID).options[0] = new Option(chooseCaption, chooseValue);
		//alert(Ajax.request.responseText);

		var	response = Ajax.request.responseXML.documentElement;
		//alert(ChildID);
		var _data = response.getElementsByTagName('row');
		var i
		for ( i = 0 ; i < _data.length ; i ++ )
		{
			document.getElementById(ChildID).options[i + 1] = new Option(
				response.getElementsByTagName('name')[i].firstChild.data,
				response.getElementsByTagName('id')[i].firstChild.data);	
		}
	}
}

Ajax.createRequestObject = function()
{
	var obj;
	if(window.XMLHttpRequest)
	{
		obj = new XMLHttpRequest();
	}
	else if(window.ActiveXObject)
	{
		obj = new ActiveXObject("MSXML2.XMLHTTP");
	}
	return obj;
}

Ajax.CheckReadyState = function(obj)
{
	if(obj.readyState == 4)
	{
		if(obj.status == 200)
		{
			return true;
		}
		else
		{
			document.getElementById(ChildID).innerHTML = "HTTP " + obj.status;
		}
	}
}