var sys = new System();

function System() {
	this.astos = new Array();
	this.adiv = new Array();

	this.dodaj = function(url,pst,did,f) {
		if(this.adiv.indexOf(did)==-1) {
			this.adiv.push(did);
			this.astos.push(new Array());
		}

		this.astos[this.adiv.indexOf(did)].push("Ajax('"+url+"','"+pst+"','"+did+"','"+f+"',true);");
	}

	this.usun = function(did)	{
		var ind=this.adiv.indexOf(did);
		var tmp=new Array();

		for(var i=1;i<this.astos[ind].length;i++) tmp.push(this.astos[ind][i]);

		this.astos[ind]=tmp;

		if(this.astos[ind].length>0) eval(this.astos[ind][0]);
	}
}

function GetXmlHttpObject() {
  var xmlHttp=null;

  try {
    xmlHttp=new XMLHttpRequest();
  } catch (e) {

    try {
      xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
    } catch (e) {
      xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
    }

  }

  return xmlHttp;
}

function xmlIni() {
	var xmlHttp;
	xmlHttp = GetXmlHttpObject();

	if (xmlHttp==null) {
		alert ("Twoja przeglądarka nie obsługuje AJAXa!");
		return null;
	} else return xmlHttp;
}

function loading(did) {
	//if($(did)) $(did).innerHTML='<center><img src="../img/load.gif" border="0" /></center>';
}


function Ajax(url,pst,did,f,s) {
	if(s == null)	{
		sys.dodaj(url,pst,did,f);
		if(sys.astos[sys.adiv.indexOf(did)].length>1) return;
	}

	loading(did);

	var xmlHttp = xmlIni();
	xmlHttp.onreadystatechange=function()	{
		if (xmlHttp.readyState == 4) {
			//obj = $(did);
			//if(obj) obj.innerHTML = xmlHttp.responseText;
      //obj = document.getElementById(did);
      //obj.innerHTML = xmlHttp.responseText;
			var wynik = xmlHttp.responseText;
			if(f!="") eval(f);
			sys.usun(did);
		}
	}

	xmlHttp.open("GET",url+pst,true);
	//xmlHttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; text/html; charset=utf-8');
	xmlHttp.send(null);
}