browser = navigator.appName;
browserNum = parseInt(navigator.appVersion);

if ((browser == "Netscape") && (browserNum < 5))
  {
  // Netscape 4.x
  layerRef = "document.layers['";
  endLayerRef = "']";
  styleRef = "";
  }
  else if ((browser == "Netscape") && (browserNum >= 5))
  {
  // Netscape 6
  layerRef = "document.getElementById('";
  styleRef = ".style";
  endLayerRef = "')";
  }
  else
  {
  // Internet Explorer
  layerRef = "document.all['";
  endLayerRef = "']";
  styleRef = ".style";
  }
  function showLayer(layerName)
  {
  eval(layerRef + layerName + endLayerRef + styleRef + ".margin = '0'");
  }
  function hiddenText(layerName){

  eval(layerRef + layerName + endLayerRef + styleRef + ".margin = '0 0 0 -9999px'");
}