// thanks to Ynubiis, http://illusions.dnsalias.com/blogs/atama
function showHideDiv(divId)
  {
    d = document.getElementById("" + divId + "");
    if (d.style.visibility == "hidden")
    {
      d.style.visibility="visible"; 
      d.style.display='';
      e = "coo" + divId + "=1";
      document.cookie=e;      
    }
    else
    {
      d.style.visibility="hidden"; 
      d.style.display='none';
      f = "coo" + divId + "=0";
      document.cookie=f;
    };
    
  }