function AmazonImage(asin){
  document.write('<img src="http://images-jp.amazon.com/images/P/'+asin+'.09.TZZZZZZZ.jpg"  id="'+asin+'" style="display: none; position: absolute;">');
}

function AmazonImageShow(asin){
  id = document.getElementById(asin);
  id.style.display='block';
}

function AmazonImageHide(asin){
  id = document.getElementById(asin);
  id.style.display='none';
}