function makeXmlHttp(){

		
	var xmlhttp = null;
   // branch for native XMLHttpRequest object
   if(window.XMLHttpRequest && !(window.ActiveXObject)) {
   	try {
		xmlhttp = new XMLHttpRequest();
       } catch(e) {
		window.alert("Uw browser ondersteunt het XMLHttpRequest object niet!");
       }
   // branch for IE/Windows ActiveX version
   } else if(window.ActiveXObject) {
      	try {
       	xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
     	} catch(e) {
       	try {
         		xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
       	} catch(e) {
         		window.alert("Uw browser ondersteunt het XMLHttpRequest object niet!");
       	}
	}
   }
   
   	return xmlhttp;
	
}
	
function show_pictures(){
	
	var indicator = document.getElementById("indicator").style;
	var xmlhttp = makeXmlHttp();
	
	xmlhttp.open("GET", "http://www.trilcoe.nl/2009/p_fotos.php", true);
	xmlhttp.onreadystatechange = function(){
		if(xmlhttp.readyState == 4){			
			
			indicator.display = "none";
			document.getElementById("fotoalbum").innerHTML = xmlhttp.responseText;
			
		}
	}
	indicator.display = "block";
	xmlhttp.send('');
}