function Ajax(bestand, elem) {
	
	if (document.getElementById) {
		var x = (window.ActiveXObject) ? new ActiveXObject("Microsoft.XMLHTTP") : new XMLHttpRequest();
	}
	
	if (x) {
		x.onreadystatechange = function() {
			if (x.readyState == 4 && x.status == 200){
				el = document.getElementById(elem);
				el.innerHTML = x.responseText;
			}
		}
		
		x.open("GET", bestand, true);
		x.send(null);
	}
}

function AjaxReturn(bestand) {
	
	if (document.getElementById) {
		var x = (window.ActiveXObject) ? new ActiveXObject("Microsoft.XMLHTTP") : new XMLHttpRequest();
	}
	
	if (x) {
		x.open("GET", bestand, false);
		x.send(null);
		return x.responseText;
	}
}

var http_request = false;
function AjaxPost(url, parameters, element) {
  http_request = false;
  if (window.XMLHttpRequest) { // Mozilla, Safari,...
    http_request = new XMLHttpRequest();
    if (http_request.overrideMimeType) {
  	 	// set type accordingly to anticipated content type
    	//http_request.overrideMimeType('text/xml');
      http_request.overrideMimeType('text/html');
    }
  	} 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('Cannot create XMLHTTP instance');
    return false;
  }
      
  http_request.onreadystatechange = function () {	  
	  if (http_request.readyState == 4) 
	  {
		  if (http_request.status == 200) 
		  {
			//alert(http_request.responseText);
			result = http_request.responseText;
			
			document.getElementById(element).innerHTML = result;            
		  } 
		  else 
		  {
			alert('Er was een probleem met de aanvraag.');
		  }
	  }  
  }

  http_request.open('POST', url, true);
  http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
  http_request.setRequestHeader("Content-length", parameters.length);
  http_request.setRequestHeader("Connection", "close");
  http_request.send(parameters);
}