function backlightOn(what) {
  what.style.backgroundColor = "#bcd";
  return true;
}

function backlightOff(what) {
  what.style.backgroundColor = "#fefefe";
  return true;
}

function onLoadFunction() {
  document.getElementById("pridatPrispevekD").style.display = "block";
  document.getElementById("pridatPrispevek").style.display = "none";
  document.getElementById("pridatPrispevekD").innerHTML = "<a onclick=\"showAdd()\" style=\"text-decoration: underline; color: #00f; cursor: pointer; cursor: hand\">přidat příspěvek</a>";
}

function showAdd() {
  document.getElementById("pridatPrispevekD").style.display = "none";
  document.getElementById("pridatPrispevek").style.display = "block";

}