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

function changeImage(id, src) {
	document.getElementById(id).src = src;
}

function changeProjectImage(src) {
	document.getElementById('big').src = src;
}

function preloadImages() {
	
	var globalPreloadImages = new Array( 
		'img/navi/kontakt_b.gif',
		'img/navi/impressum_b.gif',
		'img/navi/agb_b.gif',
		'img/navi/projekte_b.gif',
		'img/navi/seminare_b.gif',
		'img/navi/team_b.gif',
		'img/navi/back_a.gif',
		'img/navi/top_a.gif'
	);

	for (var i = 0; i < globalPreloadImages.length; i++) {
		newImage(globalPreloadImages[i]);
	}
	
	if (preImages) {
		for (var i = 0; i < preImages.length; i++) {
			newImage(preImages[i]);
		}
	}
	
}