http://www.flevofestival.nl/nieuwslijst.htm

For the multiple pages with news I do not get content back in firefox, and it works with no problems in IE

Clicking on 1 2 3 and so should open these pages :
http://www.flevofestival.nl/nieuwsli...um-desc-1-.htm
http://www.flevofestival.nl/nieuwsli...um-desc-2-.htm
http://www.flevofestival.nl/nieuwsli...um-desc-3-.htm etc

On the first pageload this is triggered :
haalnieuwslijst('datum','desc','1','');

This does get the wanted result, but after loading the buttons do not generate any content anymore

ajax code :
Code:
function haalnieuwslijst(o,r,p,catid)
	{
	//
	var ajaxRequest;  // The variable that makes Ajax possible!
	
	try{
		// Opera 8.0+, Firefox, Safari
		ajaxRequest = new XMLHttpRequest();
	} catch (e){
		// Internet Explorer Browsers
		try{
			ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try{
				ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e){
				// Something went wrong
				alert("Your browser broke!");
				return false;
			}
		}
	}
	
	// Create a function that will receive data sent from the server
	ajaxRequest.onreadystatechange = function(){
		if(ajaxRequest.readyState == 4){
			var ajaxDisplay = document.getElementById('volmidden');
			ajaxDisplay.innerHTML = ajaxRequest.responseText;
		}
	}

	var queryString = "-" + o + "-" + r + "-" + p + "-" + catid;
	ajaxRequest.open("GET", "nieuwslijstres" + queryString + ".htm", true);
	ajaxRequest.send(null); 	
	}