var objCount = 0;
function preload(name, first, second) {  
  if (browserOK) {     
    pics[objCount] = new Array(3);
    pics[objCount][0] = new Image();
    pics[objCount][0].src = first;
    pics[objCount][1] = new Image();
    pics[objCount][1].src = second;
    pics[objCount][2] = name;
    objCount++;
  }
}
function on(name){
  if (browserOK) {
     for (i = 0; i < objCount; i++) {
      if (document.images[pics[i][2]] != null)
        if (name != pics[i][2]) { 
          document.images[pics[i][2]].src = pics[i][0].src;
        } else {
          document.images[pics[i][2]].src = pics[i][1].src;
        }
    }
  }
}
function off(){
  if (browserOK) {
     for (i = 0; i < objCount; i++) {
      if (document.images[pics[i][2]] != null) 
        document.images[pics[i][2]].src = pics[i][0].src;
    }
  }
}
preload("link1", "/images/index.gif", "/images/index-on.gif");
preload("link2", "/images/acoustics.gif", "/images/acoustics-on.gif");
preload("link3", "/images/sound.gif", "/images/sound-on.gif");
preload("link4", "/images/design.gif", "/images/design-on.gif");
preload("link5", "/images/power.gif", "/images/power-on.gif");
preload("link6", "/images/news.gif", "/images/news-on.gif");
preload("link7", "/images/about.gif", "/images/about-on.gif");
preload("link8", "/images/where2buy.gif", "/images/where2buy-on.gif");
preload("link9", "/images/fun.gif", "/images/fun-on.gif");
preload("link10", "/images/faq.gif", "/images/faq-on.gif");
preload("link11", "/images/new.gif", "/images/new-on.gif");
preload("link12", "/images/promo-action.gif", "/images/promo-action-on.gif");

preload("topmenu1", "/images/order.gif", "/images/order-on.gif");
preload("topmenu2", "/images/ask.gif", "/images/ask-on.gif");
preload("topmenu3", "/images/search.gif", "/images/search-on.gif");