function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		home_onder_over = newImage("../images/home_onder-over.gif");
		offerte_onder_over = newImage("../images/offerte_onder-over.gif");
		particulier_onder_over = newImage("../images/particulier_onder-over.gif");
		zakelijk_onder_over = newImage("../images/zakelijk_onder-over.gif");
		berekening_onder_over = newImage("../images/berekening_onder-over.gif");
		contact_onder_over = newImage("../images/contact_onder-over.gif");
		preloadFlag = true;
	}
}