function si(n)
{
  //var cs_span = document.getElementById('cs');
  var im_img = document.getElementById('im');
  
  try
  {
    if(goods[n])
    {
      //cs_span.innerHTML = goods[n].cost;
      im_img.src = goods[n].img;
    }
  }
  catch(e)
  {
  }
}