var huidig = 0;
	function showBig(id) {
		if (huidig != 0) {
			hideBig(huidig)
		}
		huidig = id;
		document.getElementById('big' + id).style.visibility = 'visible';
	}
	function hideBig(id) {
		document.getElementById('big' + id).style.visibility = 'hidden';
	}
	function showBigger(id,map) {
		var a = '<img onclick="document.getElementById(\'frameDetail\').style.display=\'none\'" src="images/'+ map +'/original/' + id + '.jpg" />';
		document.getElementById('bigger').innerHTML = a;
		document.getElementById('frameDetail').style.display = 'block';
	}

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);