function ShowOne() {
  document.getElementById("block1").style.display = "block";
  document.getElementById("block2").style.display = "none";
  document.getElementById("block3").style.display = "none";
}

function ShowTwo() {
  document.getElementById("block1").style.display = "none";
  document.getElementById("block2").style.display = "block";
  document.getElementById("block3").style.display = "none";
}

function ShowThree() {
  document.getElementById("block1").style.display = "none";
  document.getElementById("block2").style.display = "none";
  document.getElementById("block3").style.display = "block";
  onLoad();
}


var iId = 0;

function ShowMenu() {
  cMenu.style.display = "block";
  clearInterval(iId)
}

function HideMenu() {
  iId = setInterval("rHideMenu()", 200);
}

function rHideMenu() {
  cMenu.style.display = "none";
}