function show(element){

           element.className += "hover";
		  

   }

 function hide(element){
           element.className = element.className = "";
		  
          
     }

function resetImage (imageName) {
  document.images[imageName].style.display = "none";
   delete imageName;

}

function showImage (imageName) {
  document.images[imageName].style.display = "block";

}