//---------------------------Standard Image Replacement Code Begins---------------------------------
//A required Variable for the loadImages() function
loadedImages = null

function loadImages(){
   var img
   if (document.images){
      if (!loadedImages) loadedImages = new Array()
      for (var i=0; i < arguments.length; i++){
         img = new Image()
         img.src = arguments[i]
         loadedImages[loadedImages.length] = img
      }
   }   
}

function flip(imgName, imgSrc){
   if (document.images){
      document[imgName].src = imgSrc
   }
}

loadImages('images/bus-small.png','images/bus-hoverlarge.png', 'images/home-small.png', 'images/home-hover.png, ../images/help!.png, ../images/help!-hover.png')