function opcl(ob,id, word)
{
  if(ob.className == "prodCat open")
   {
      ob.className = "prodCat closed";
      document.getElementById('title_'+id).innerHTML = close;
      document.getElementById('opcl_'+id).src=document.getElementById('opcl_'+id).src.replace("minus", "plus");
   }
   else
   {
      ob.className = "prodCat open";
      document.getElementById('title_'+id).innerHTML = open;
      document.getElementById('opcl_'+id).src=document.getElementById('opcl_'+id).src.replace("plus", "minus");
   }
}