function imgpreload() {
	bilder = new Array();
	if(document.images) {        
		bilder[0] = new Image();
		bilder[0].src = "../images/button_neuheiten_hover.jpg";

		bilder[1] = new Image();
		bilder[1].src = "../images/button_katalog_hover.jpg";

		bilder[2] = new Image();
		bilder[2].src = "../images/button_unternehmen_hover.jpg";

		bilder[3] = new Image();
		bilder[3].src = "../images/button_kontakt_hover.jpg";
    	}
}

imgpreload('../images/button_neuheiten_hover.jpg','../images/button_katalog_hover.jpg','../images/button_unternehmen_hover.jpg','../images/button_kontakt_hover.jpg');