sfHover = function() {
	var sfEls = document.getElementById("nav").getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
}
if (window.attachEvent) 
{
	window.attachEvent("onload", sfHover);
}


function createXMLHttpRequest() {
	var oRequest = null;
	try {
		oRequest = new XMLHttpRequest();
	} catch (e) {
		try {
			oRequest = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try{
				oRequest = new ActiveXObject("MicroSoft.XMLHTTP");
			} catch (e) {
				oRequest = null;
				alert("Unable to create XMLHttpRequest");
			}
		}
	}
	return oRequest;
}

var oXmlhttp;


function woningcounter (id)
{
	var id;
	oXmlhttp = createXMLHttpRequest();
	oXmlhttp.open('GET', 'woningcounter.php?id=' + id, true);
	oXmlhttp.send(null);
}