var preloaded = [];

   // here is a lame preloading script i am putting in just for demonstration
   for (var i = 1; i <= 1; i++) {
    preloaded[i] = [loadImage(i + "-0.gif"), loadImage(i + "-1.gif")];
   }

   function init() {
    // whatever stuff you need to do onload goes here.

    //==========================================================================================
    // if supported, initialize mtdropdowns
    //==========================================================================================
    // Check isSupported() so that menus aren't accidentally sent to non-supporting browsers.
    // This is better than server-side checking because it will also catch browsers which would
    // normally support the menus but have javascript disabled.
    //
    // If supported, call initialize() and then hook whatever image rollover code you need to do
    // to the .onactivate and .ondeactivate events for each menu.
    //==========================================================================================
    if (mtDropDown.isSupported()) {
     mtDropDown.initialize();

    
    }
   }

   // this is a crappy example preloader. Use whichever one you want.
   function loadImage(sFilename) {
    var img = new Image();
    img.src ="_images/nav/" + sFilename;
    return img;
   }

   // this is a crappy example image swapper. Use whichever you want.
   function swapImage(imgName, sFilename) {
   document.images[imgName].src = sFilename;
   }