ns = (document.layers)? true:false
ie = (document.all)? true:false
moz = (document.getElementById)? true:false

function popUp(layername,on)
{ if(on)
  { if(ns)
    { document.layers[layername].visibility="visible";
    }
    else
    { if(ie)
      { document.all(layername).style.display="block";
      }
      else
      { document.getElementById(layername).style.display="block";
      }
    }
  }
  else
  { if(ns)
    { document.layers[layername].visibility="hidden";
    }
    else
    { if(ie)
      { document.all(layername).style.display="none";
      }
      else
      { document.getElementById(layername).style.display="none";
      }
    }
  }
}

function ShowOnly(lname)
{ for($a=1; $a<13; $a++)
  { popUp('cfrsub'+$a,0);
  }
  popUp(lname,1);
}