function popup(url, title, W, H, features){
	var X = Math.ceil((window.screen.availWidth - W) / 2);
	var Y = Math.ceil((window.screen.availHeight - H) / 2);
	features = "width=" + W + ", height=" + H + ", left=" + X + ", top=" + Y + ", " + features;
	open(url, title, features);
}
function openWin1(url) {
	window.open(url, 'url', "toolbar=0,location=0,directories=0,status=0,menubar=no,scrollbars=no,resizable=no,width=500,height=500");
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}
function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
function MM_preloadImages() { //v3.0
 var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
   var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
   if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}


function GetXmlHttpObject(){
	var xmlHttp = null;
	try{// Firefox, Opera 8.0+, Safari
		xmlHttp=new XMLHttpRequest();
	}catch (e){// Internet Explorer 6+
		try{
			xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
      	}catch (e){
			try{// Internet Explorer 5+
				xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
			}catch (e){
				alert("Your browser does not support AJAX!");
				return false;
			}
		}
	}
	return xmlHttp;
}

function ShowNextEvent(IdCurrentEvent){
	var url = 'nextEvent.php?thisEvent=' + IdCurrentEvent + '';
	
	xmlHttp = GetXmlHttpObject();
	if(xmlHttp == null){
		alert ("Please update your browser!");
		return;
	}
	xmlHttp.open("GET", url, true);
	xmlHttp.send(null);
	xmlHttp.onreadystatechange = function(){
		if(xmlHttp.readyState == 4){
			var xmldoc =  xmlHttp.responseText;
			var data = eval('(' + xmldoc + ')');
			if(data.events[0].event.err > 0){
				document.getElementById('nextEventContainer').innerHTML = data.events[0].event.content;
				document.getElementById('nextEventButtonContainer').innerHTML = '<input type="image" src="images/next-event.gif" onclick="javascript:ShowNextEvent(' + data.events[0].event.thisEvent + ');" />';
			}
		}
	}
}