function occFilter()
{	
	document.getElementById('sort').disabled = true;
	document.getElementById('type').disabled = true;
	document.getElementById('order').disabled = true;
	document.getElementById('foto').disabled = true;
	
 	obj_select_sort = document.getElementById('sort');
 	obj_select_type = document.getElementById('type');
 	obj_select_order = document.getElementById('order');
 	obj_select_foto = document.getElementById('foto');
 	
 	document.getElementById('occassion_list').innerHTML = '<br><center><img src="/images/loading.gif" border="0"> Bezig met laden. Even geduld A.U.B......</center>';
 	
	var http = ajaxinit();
 	
 	var str;
 	str = 'dofilter=true&sort='+obj_select_sort.value+'&type='+obj_select_type.value+'&order='+obj_select_order.value+'&foto='+obj_select_foto.value;
 	
	if(http)
	{
		http.open('POST','/p/occassion/ajax/1/',true); 
		http.setRequestHeader('Content-Type','application/x-www-form-urlencoded;'); 
		http.onreadystatechange = processReqChange;
		http.send(str);
	}

	function processReqChange()
	{
		if (http.readyState == 4)
		{
			if (http.status == 200)
			{
				document.getElementById('occassion_list').innerHTML = http.responseText;
				ricoajax();
			} else {
				alert("There was a problem retrieving the XML data:\n" + http.statusText);
			}

			document.getElementById('sort').disabled=false;
			document.getElementById('type').disabled=false;
			document.getElementById('order').disabled=false;
			document.getElementById('foto').disabled=false;
		}
   	}
}