var xmlHttp;

function checkStatus(numer)
{
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null)
	{
		alert ("Browser does not support HTTP Request")
		return
	} 
	var url="./ajax.php"
	url=url+"?nr="+numer
	url=url+"&sid="+Math.random()
	//alert(url);
	xmlHttp.onreadystatechange= function () {showInfo(xmlHttp, 'status')}
	xmlHttp.open("GET",url,true)
	xmlHttp.send(null)
}

function showInfo(xmlHttp, elementID)
{
	//0	The request is not initialized
	//1	The request has been set up
	//2	The request has been sent
	//3	The request is in process
	//4	The request is completed
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
	{
		//alert(elementID)
		document.getElementById(elementID).innerHTML=xmlHttp.responseText
	}
}

// funckaj tworzaca obiekt xmlhttpobject
// zawsze taka sama
function GetXmlHttpObject()
{
	var XMLHttp=null
	if (window.ActiveXObject)
	{
		XMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
	}

	if (XMLHttp==null)
	{
		XMLHttp=new XMLHttpRequest()
	}

	return XMLHttp
}