

<!------------------------ JAVASCRIPT FOR TOP MENU BEGIN ------------------>
  var Menus = new Array();
  
  function on(num){
    document ['menu' + num].src = Menus[1][num].src;
  }
  
  function off(num){
    document ['menu' + num].src = Menus[0][num].src;
  }
  
  function MenuSubSelect(select){
    for ( var i = 1; i < Menus[0].length; i++ ){
      if(document.getElementById('submenu' + i) != null){
        if (i == select){
          //document.all['submenu' + i].style.visibility = "";
          document.getElementById('submenu' + i).style.visibility = "";
          document['menu' + i].src =  Menus[1][i].src;
        } else {
          //document.all['submenu' + i].style.visibility = "hidden";
          document.getElementById('submenu' + i).style.visibility = "hidden";
          document['menu' + i].src =  Menus[0][i].src;
        }
      }
    }			
  }

  function preloadMenuImage(){
    for(i = 0; i < arguments.length; i++) {
      num = Math.floor(i / 2) + 1;
      if(Menus[i % 2] == null) Menus[i % 2] = new Array();
      if(Menus[i % 2][num] == null) Menus[i % 2][num] = new Image();
      Menus[i % 2][num].src = arguments[i];
    }
  }  
<!------------------------ JAVASCRIPT FOR TOP MENU END -------------------->
<!------------------------ JAVASCRIPT FOR LEFT MENU BEGIN ----------------->
  var preloadImages = new Array();
  
  function rollOn(prefix, num){
    document [prefix + num].src = preloadImages[prefix][1][num].src;
  }

  function rollOff(prefix, num){
    document [prefix + num].src = preloadImages[prefix][0][num].src;
  }
  
  function preloadImage(prefix){
    for(i = 1; i < arguments.length; i++) {
      num = Math.floor((i -1) / 2);
      if(preloadImages[prefix] == null) preloadImages[prefix] = new Array();
      if(preloadImages[prefix][i % 2] == null) preloadImages[prefix][i % 2] = new Array();
      if(preloadImages[prefix][i % 2][num] == null) preloadImages[prefix][i % 2][num] = new Image();      
      preloadImages[prefix][i % 2][num].src = arguments[i];
    }
  }
<!------------------------ JAVASCRIPT FOR LEFT MENU END ------------------->