Header('Content-type: text/html; charset=iso-8859-2');
var timerID = 0;
var stronka = null;
var ostatnia;

clearTimeout(timerID);

function sprawdz(strona){
makeRequest(strona);
timerID=setTimeout("sprawdz('"+strona+"')",1000);
}


    var http_request = false;

    function makeRequest(url) {

        http_request = false;

        if (window.XMLHttpRequest) { // Mozilla - moze byc
            http_request = new XMLHttpRequest();
            if (http_request.overrideMimeType) {
                http_request.overrideMimeType('text/xml');
            }
        } else if (window.ActiveXObject) { // mikroszit ie - czyli badziewie
            try {
                http_request = new ActiveXObject("Msxml2.XMLHTTP");
            } catch (e) {
                try {
                    http_request = new ActiveXObject("Microsoft.XMLHTTP");
                } catch (e) {}
            }
        }

        if (!http_request) {
            return false;
        }
        http_request.onreadystatechange = function() { alertContents(http_request); };
        http_request.open('GET', url, true);
        http_request.send(null);

    }

    function alertContents(http_request) {

        if (http_request.readyState == 4) {
			if (http_request.responseText==ostatnia){}else
			{
            if (http_request.status == 200) {
               if(document.getElementById('tresc')){document.getElementById('tresc').innerHTML = unescape(http_request.responseText);}
               
		
            } else {
               if(document.getElementById('tresc')){document.getElementById('tresc').innerHTML = unescape(http_request.responseText);}
            
            
            }
			ostatania=http_request.responseText;
			}
        }
		
    }