preloadImages();

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

function switch_on(imgname) {

	document[imgname].src = eval(imgname + "_on.src");
}

function switch_off(imgname) {

	document[imgname].src = eval(imgname + ".src");
}

function preloadImages() {
	if (document.images) {
		home_on = newImage("images/buttons/home_on.gif");
		beveiliging_on = newImage("images/buttons/beveiliging_on.gif");
		schoonmaak_on = newImage("images/buttons/schoonmaak_on.gif");
		offerte_on = newImage("images/buttons/offerte_on.gif");
		solliciteren_on = newImage("images/buttons/solliciteren_on.gif");
		links_on = newImage("images/buttons/links_on.gif");
		contact_on = newImage("images/buttons/contact_on.gif");

		home = newImage("images/buttons/home.gif");
		beveiliging = newImage("images/buttons/beveiliging.gif");
		schoonmaak = newImage("images/buttons/schoonmaak.gif");
		offerte = newImage("images/buttons/offerte.gif");
		solliciteren = newImage("images/buttons/solliciteren.gif");
		links = newImage("images/buttons/links.gif");
		contact = newImage("images/buttons/contact.gif");
		
		}
}