// VARIABLES
  ns4 = (document.layers)? true:false
  ie4 = (document.all)? true:false

function showObject(obj){
    if (ns4){
      obj.visibility = "show";
    }else if (ie4){
      obj.style.visibility = "visible";
    }
  }

  function hideObject(obj){
    if (ns4){
      obj.visibility = "hide";
    }else if (ie4){
      obj.style.visibility = "hidden";
    }
}