function init() {
  if (!document.getElementsByTagName) { return; }
  var objs = document.getElementsByTagName("div");
  for (i = 0; i < objs.length; i++) {
    if (objs[i].className == "item") {
      objs[i].style.display = "none";
    }
  }
}
function func(id) {
  if (!document.getElementsByTagName) { return false; }
  var obj = document.getElementById(id);
  if (obj.style.display == "block") {
    obj.style.display = "none";
  } else {
    obj.style.display = "block";
  }
  return false;
}