var eventID = eventID;
var page = "getSlideshow.php";
function ajax(url,target,eventID) {
    // native XMLHttpRequest object
   url = "getSlideshow.php?event"+eventID;
   document.getElementById(target).innerHTML = '';
   if (window.XMLHttpRequest) {
       req = new XMLHttpRequest();
       req.onreadystatechange = function() {ajaxDone(target);};
       req.open("POST", url, true);
       req.send(null);
   // IE/Windows ActiveX version
   } else if (window.ActiveXObject) {
       req = new ActiveXObject("Microsoft.XMLHTTP");
       if (req) {
           req.onreadystatechange = function() {ajaxDone(target);};
           req.open("POST", url, true);
           req.send();
       }
   }
		   setTimeout("ajax(page,'slide-show')", 10000);
}

function ajaxDone(target) {
	// only if req is "loaded"
	obj = document.getElementById("slide-show");
	setFade(0);
	if (req.readyState == 4) {
	// only if "OK"
		if (req.status == 200 || req.status == 304) {
			response = req.responseText;
            obj.innerHTML = response;
			fade(0);
		} else {
			document.getElementById(target).innerHTML="ajax error:\n" +
			req.statusText;
		}
	}
}
function fade(amt) {
	if(amt <= 100) {
		setFade(amt);
		amt += 5;
		setTimeout("fade("+amt+")", 5);
    }
}

function setFade(amt) {
	obj = document.getElementById("slide-show");
	amt = (amt == 100)?99.999:amt;
	// IE
	obj.style.filter = "alpha(opacity:"+amt+")";
	// Safari<1.2, Konqueror
	obj.style.KHTMLOpacity = amt/100;
	// Mozilla and Firefox
	obj.style.MozOpacity = amt/100;
	// Safari 1.2, newer Firefox and Mozilla, CSS3
	obj.style.opacity = amt/100;
}