var browser = (document.images);

 if (browser){
   normal = new createArray(14)
   over = new createArray(14)

 // standard images	  
 normal[0].src = "media/images/button-flavour.gif"
 normal[1].src = "media/images/button-power.gif"
 normal[2].src = "media/images/button-events.gif"
 normal[3].src = "media/images/button-fun-dl.gif"
 normal[4].src = "media/images/button-contact.gif"
 normal[5].src = "media/images/button-haendler.gif"
 normal[6].src = "media/images/button-0.5l.gif"
 normal[7].src = "media/images/button-1.5l.gif"
 normal[8].src = "media/images/button-display.gif"
 normal[9].src = "media/images/button-pictures.gif"
 normal[10].src = "media/images/button-downloads.gif"
 normal[11].src = "media/images/button-shop.jpg"
 normal[12].src = "media/images/button-dose.gif"
 normal[13].src = "media/images/button-links.gif"
 
 // highlighted images	 
 over[0].src = "media/images/button-flavour-a.gif"
 over[1].src = "media/images/button-power-a.gif"
 over[2].src = "media/images/button-events-a.gif"
 over[3].src = "media/images/button-fun-dl-a.gif"
 over[4].src = "media/images/button-contact-a.gif"
 over[5].src = "media/images/button-haendler-a.gif"
 over[6].src = "media/images/button-0.5l-a.gif"
 over[7].src = "media/images/button-1.5l-a.gif"
 over[8].src = "media/images/button-display-a.gif"
 over[9].src = "media/images/button-pictures-a.gif"
 over[10].src = "media/images/button-downloads-a.gif"
 over[11].src = "media/images/button-shop-a.jpg"
 over[12].src = "media/images/button-dose-a.gif"
 over[13].src = "media/images/button-links-a.gif"
}

 function createArray(n){
   this.length = n
   for (var i = 0; i<=n; i++)
   {
     this[i] = new Image()
   }
   return this
 }
  
 function roll(img,x){
   if (browser){
    document [img].src = over[x].src
  }
 }

 function unroll(img,x){
   if (browser){
    document [img].src = normal[x].src
  }
 }