userAgent = window.navigator.userAgent;
browserVers = parseInt(userAgent.charAt(userAgent.indexOf("/")+1),10);
function _newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function _findElement(n,ly) {
	if (browserVers < 4)		return document[n];
	var curDoc = ly ? ly.document : document;
	var elem = curDoc[n];
	if (!elem) {
		for (var i=0;i<curDoc.layers.length;i++) {
			elem = _findElement(n,curDoc.layers[i]);
			if (elem) return elem;
		}
	}
	return elem;
}

function _changeImages() {
	if (document.images && (preloadFlag == true)) {
		var img;
		for (var i=0; i<_changeImages.arguments.length; i+=2) {
			img = null;
			if (document.layers) {
				img = findElement(_changeImages.arguments[i],0);
			}
			else {
				img = document.images[_changeImages.arguments[i]];
			}
			if (img) {
				img.src = _changeImages.arguments[i+1];
			}
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		_menu_overmiva = _newImage("/templates/MIVA_voorpagina/images/menu_overmiva.gif");
		_menu_overmiva_hover = _newImage("/templates/MIVA_voorpagina/images/menu_overmiva_hover.gif");
		_overmiva = _newImage("/templates/MIVA_voorpagina/images/overmiva.jpg");

		_menu_projecten = _newImage("/templates/MIVA_voorpagina/images/menu_projecten.gif");
		_menu_projecten_hover = _newImage("/templates/MIVA_voorpagina/images/menu_projecten_hover.gif");
		_projecten = _newImage("/templates/MIVA_voorpagina/images/projecten.jpg");
	
		_menu_resultaten = _newImage("/templates/MIVA_voorpagina/images/menu_resultaten.gif");
		_menu_resultaten_hover = _newImage("/templates/MIVA_voorpagina/images/menu_resultaten_hover.gif");
		_resultaten = _newImage("/templates/MIVA_voorpagina/images/resultaten.jpg");
		
		_menu_doneren = _newImage("/templates/MIVA_voorpagina/images/menu_doneren.gif");
		_menu_doneren_hover = _newImage("/templates/MIVA_voorpagina/images/menu_doneren_hover.gif");
		_doneren = _newImage("/templates/MIVA_voorpagina/images/doneren.jpg");
		preloadFlag = true;
	}
}