function Req(url,target) {
    // native XMLHttpRequest object
        document.getElementById(target).innerHTML = '<img src="Afbeeldingen/ajax-loader.gif" alt="Bezig met laden..." class="AjaxLoader">';
    if (window.XMLHttpRequest) {
        req = new XMLHttpRequest();
        req.onreadystatechange = function() {ReqDone(target);};
        req.open("GET", url, true);
        req.send(null);
    // IE/Windows ActiveX version
    } else if (window.ActiveXObject) {
        req = new ActiveXObject("Microsoft.XMLHTTP");
        if (req) {
            req.onreadystatechange = function() {ReqDone(target);};
            req.open("GET", url, true);
            req.send();
        }
    }
} 

function ReqDone(target) {
    // only if req is "loaded"
    if (req.readyState == 4) {
        // only if "OK"
        if (req.status == 200) {
            results = req.responseText;
            document.getElementById(target).innerHTML = results;
        } else {
            document.getElementById(target).innerHTML="<div class='Foutmelding'>Fout: Kan pagina niet vinden!</div>" 
        }
    }
}


function toon(divID) {
	var item = document.getElementById(divID);
	if (item) {
		item.className=(item.className=='hidden')?'unhidden':'hidden';
	}
}

function vervang(divID1, divID2) {
	var item1 = document.getElementById(divID1);
	var item2 = document.getElementById(divID2);
	if (item2) {
		item2.className=(item2.className=='hidden')?'unhidden':'hidden';
	}
	if (item1) {
		item1.className='hidden';
	}
}