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

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

function changeImages() {
	
	changeImagesArray(changeImages.arguments);
}

function toggleImages() {
	for (var i=0; i<toggleImages.arguments.length; i+=2) {
		if (selected == toggleImages.arguments[i])      changeImagesArray(toggleImages.arguments[i+1]);
	}
}

var selected = '';
var preloadFlag = false;
function preloadImages() {

	if (document.images) {
		
		
		
		button_home_over = newImage("/~chris/jgcl/bilder/button_home-over.gif");
		button_home_down = newImage("/~chris/jgcl/bilder/button_home-down.gif");
		
		button_profil_over = newImage("/~chris/jgcl/bilder/button_profil-over.gif");
		button_profil_down = newImage("/~chris/jgcl/bilder/button_profil-down.gif");
		
		button_verbaende_over = newImage("/~chris/jgcl/bilder/button_verbaende-over.gif");
		button_verbaende_down = newImage("/~chris/jgcl/bilder/button_verbaende-down.gif");
		
		button_publikationen_over = newImage("/~chris/jgcl/bilder/button_publikationen-over.gif");
		button_publikationen_down = newImage("/~chris/jgcl/bilder/button_publikationen-down.gif");
		
		button_termine_over = newImage("/~chris/jgcl/bilder/button_termine-over.gif");
		button_termine_down = newImage("/~chris/jgcl/bilder/button_termine-down.gif");
		
		button_shop_over = newImage("/~chris/jgcl/bilder/button_shop-over.gif");
		button_shop_down = newImage("/~chris/jgcl/bilder/button_shop-down.gif");
		
		button_links_over = newImage("/~chris/jgcl/bilder/button_links-over.gif");
		button_links_down = newImage("/~chris/jgcl/bilder/button_links-down.gif");
		
		button_kontakt_over = newImage("/~chris/jgcl/bilder/button_kontakt-over.gif");
		button_kontakt_down = newImage("/~chris/jgcl/bilder/button_kontakt-down.gif");
		
		preloadFlag = true;
	}
}