hover = new Image();
     hover.src = 'images/nav/party_nav.jpg';
     norm = new Image();
     norm.src = 'images/nav/party_nav_bw.jpg';

     whover = new Image();
     whover.src = 'images/nav/web_nav.jpg';
     wnorm = new Image();
     wnorm.src = 'images/nav/web_nav_bw.jpg';

     fhover = new Image();
     fhover.src = 'images/nav/fragen_nav.jpg';
     fnorm = new Image();
     fnorm.src = 'images/nav/fragen_nav_bw.jpg';

     pnorm = new Image();
     pnorm.src = 'images/nav/fotos_nav_bw.jpg';
     phover = new Image();
     phover.src = 'images/nav/fotos_nav.jpg';

     snorm = new Image();
     snorm.src = 'images/nav/soccer_nav_bw.jpg';
     shover = new Image();
     shover.src = 'images/nav/soccer_nav.jpg';

     function mo(image, type) {
       if(document.images) {
         if (type == 'weg') {
           document.images[image].src = whover.src;
         } else if (type == 'fragen') {
           document.images[image].src = fhover.src;
         } else if (type == 'fotos') {
           document.images[image].src = phover.src;
         } else if (type == 'soccer') {
           document.images[image].src = shover.src;
         } else {
           document.images[image].src = hover.src;
         }
       }
     }

     function mout(image, type) {
       if(document.images) {
         if (type == 'weg') {
           document.images[image].src = wnorm.src;
         } else if (type == 'fragen') {
           document.images[image].src = fnorm.src;
         } else if (type == 'fotos') {
           document.images[image].src = pnorm.src;
         } else if (type == 'soccer') {
           document.images[image].src = snorm.src;
         } else {
           document.images[image].src = norm.src;
         }
       }
     }