function makeHttpRequest(url, callback_function, return_xml)
{
   var http_request = false;

   if (window.XMLHttpRequest) { // Mozilla, Safari,...
       http_request = new XMLHttpRequest();
       if (http_request.overrideMimeType) {
           http_request.overrideMimeType('text/xml');
       }

   } else if (window.ActiveXObject) { // IE
       try {
           http_request = new ActiveXObject("Msxml2.XMLHTTP");
       } catch (e) {
           try {
               http_request = new ActiveXObject("Microsoft.XMLHTTP");
           } catch (e) {}
       }
   }

   if (!http_request) {
       alert('Unfortunatelly you browser doesn\'t support this feature.');
       return false;
   }
   http_request.onreadystatechange = function() {
       if (http_request.readyState == 4) {
           if (http_request.status == 200) {
               if (return_xml) {
                   eval(callback_function + '(http_request.responseXML)');
               } else {
                   eval(callback_function + '(http_request.responseText)');
               }
           } else {
               /*alert('There was a problem with the request.(Code: ' + http_request.status + ')');*/
           }
       }
   } 
   http_request.open('GET', url, true);
   http_request.send(null);
}

function loadBanner(xml)
{
    var html_content = xml.getElementsByTagName('content').item(0).firstChild.nodeValue;
    var reload_after = xml.getElementsByTagName('reload').item(0).firstChild.nodeValue;
    var kotwica = xml.getElementsByTagName('kotwica').item(0).firstChild.nodeValue;
    document.getElementById('ajax-banner').innerHTML = html_content;
    document.getElementById('ajax-banner').href= kotwica;

    try {
        clearTimeout(to);
    } catch (e) {}

    to = setTimeout("nextAd()", parseInt(reload_after));


}

function nextAd()
{

    var now = new Date();
    var url = '/e/banner-rotator.php' + '?x=' + now.getTime();
    makeHttpRequest(url, 'loadBanner', true);
}
/*
window.onload = function() {
    
    // horní promotion banner
    var banner_count = 3; // počet obrázků
	var banner_delay = 2000 // prodleva v ms

	var banner_counter = 2;
	var banner_headers = new Array();

	for (var i=1;i<=banner_count;i++) {
		banner_headers[i] = document.getElementById('banner-scr'+i);
	}
	
	function banner_update() {
		changeOpac(0,banner_headers[banner_counter]);
		for (var i=banner_count-1;i>=0;i--) {
			if (typeof banner_headers[banner_counter-i] == 'undefined') {
				banner_headers[banner_counter-i+banner_count].style.zIndex = banner_count-i;
			} else {
				banner_headers[banner_counter-i].style.zIndex = banner_count-i;
			}
		}		
		for(var i=1;i<=50;i++) {
			(function() {
				var actualI = 2*i;
				var obj = banner_headers[banner_counter];
				setTimeout(function() {
					changeOpac(actualI,obj);
				}, actualI*5);
			})();
		}
		banner_counter++;
		if (banner_counter>banner_count) banner_counter = 1;
	}
	
	function changeOpac(opacity, object) {
		object.style.opacity = (opacity / 100);
		object.style.MozOpacity = (opacity / 100);
		object.style.KhtmlOpacity = (opacity / 100);
		object.style.filter = "alpha(opacity=" + opacity + ")";
	}
	
	for (var i=1;i<=banner_count;i++) {
		var j = i;
		(function() {
			var k = j;
			document.getElementById('banner-lnk'+k).onclick = function() {
				if (k+1>banner_count) {
					banner_counter = k-banner_count+1;
				} else {
					banner_counter = k+1;
				}
				for (var i=1;i<=banner_count;i++) {
					banner_headers[i].style.zIndex = 0;
				}
				banner_headers[k].style.zIndex = banner_count+1;
				clearInterval(timer);
				timer = setInterval(banner_update,banner_delay);
				return false;
			}
		})();
	}
	var timer = setInterval(banner_update,banner_delay);

    // cyklování referencí
    nextAd();
}*/

window.onload = nextAd; //jen samotné reference, predchozi zakomentovane i s bannerem ls