var tags =  [ 'home', 'about', 'gallery', 'g1', 'g2', 'g3', 'g4', 'g5', 'g6', 'g7', 'g8', 'g9', 'music', 'links', 'contact' ];

function turnon(layer) {
  if (document.getElementById) {
    document.getElementById(layer).style.display = "block";
  } else if (document.all) {
    document.all[lery].style.display = "block";
  } else if (document.layers) {
    document.layers[layer].style.display = "block";
  }
}

function toggle(layer) {
  clearall(layer);

  if (document.getElementById) {
    document.getElementById(layer).style.display = "block"; 
    if (layer == 'gallery')  document.getElementById('g1').style.display = "block";
    if (layer.match(/^g\d/)) document.getElementById('gallery').style.display = "block"; 
  } else if (document.all) {
    document.all[layer].style.display = "block";
    if (layer == 'gallery')  document.all['g1'].style.display = "block";
    if (layer.match(/^g\d/)) document.all['gallery'].style.display = "block";
  } else if (document.layers) {
    document.layers[layer].style.display = "block";
    if (layer == 'gallery')  document.layers['g1'].style.display = "block";
    if (layer.match(/^g\d/)) document.layers['gallery'].style.display = "block";
  }
}

function clearall(layer) {
  var i;
  for (i = 0; i < tags.length; i++) {
    if (layer != tags[i]) {
      if (document.getElementById) {
        document.getElementById(tags[i]).style.display = "";
      } else if (document.all) {
        document.all[tags[i]].style.display = "";
      } else if (document.layers) {
        documents.layers[tags[i]].style.display = "";
      }
    }
  }
}