function keep_max(images) {


   images.style.width = null;

   if (images.className == 'small_sale_thumb')
   {
     max_width  = 100 ;
     max_height = 110 ;
   }else if (images.className == 'middle_sale_thumb')
   {
     max_width  = 200 ;
     max_height = 300 ;
   }else
   {
     return null;
   }


   
   if ( images.height > max_height) 
   {
            now_width = images.width;
            now_height = images.height;
            factor = max_height/now_height;
            images.height = max_height ;
            images.width = now_width * factor;
   }
   
   if (images.width > max_width )
   {

            factor = max_width/images.width;
            images.width = max_width ;
            images.height = images.height * factor;
   }

   images.style.visibility = "visible";



}

function body_max() {

  for (i in document.images) 
  {


   if (document.images[i].className == 'small_sale_thumb')
   {
    document.images[i].style.width = null;
     max_width  = 100 ;
     max_height = 110 ;
   }else if (document.images[i].className == 'middle_sale_thumb')
   {
     document.images[i].style.width = null;
     max_width  = 200 ;
     max_height = 300 ;
   }else
   {
     continue;
   }


   
   if ( document.images[i].height > max_height) 
   {
            now_width = document.images[i].width;
            now_height = document.images[i].height;
            factor = max_height/now_height;
            document.images[i].height = max_height ;
            document.images[i].width = now_width * factor;
   }
   
   if (document.images[i].width > max_width )
   {

            factor = max_width/document.images[i].width;
            document.images[i].width = max_width ;
            document.images[i].height = document.images[i].height * factor;
   }

   document.images[i].style.visibility = "visible";

  }

}