function showLayer(act) {
 if (act == "show") {
  document.getElementById("morelayer").style.display = "inline";
  document.getElementById("more").style.display = "none";
  document.getElementById("less").style.display = "inline";
 } else {
  document.getElementById("morelayer").style.display = "none";
  document.getElementById("more").style.display = "inline";
  document.getElementById("less").style.display = "none";
 }
}