function hideAll() {
  var subMenus = getElementsByClass("submenu");
  for (var i=0; i<subMenus.length; i++) {
    var subMenu = subMenus[i];
    subMenu.style.display="none";
  } //end for
} //end function

function showMenu(titleId) {
  hideAll();
  menuToShow=document.getElementById("submenu"+titleId.substring(5));
  menuToShow.style.display="block";
  return false;
} //end function

function initiateMenu() {
  //hideAll();
  var subMenuTitles = getElementsByClass("submenu_title");
  for (var i=0; i<subMenuTitles.length; i++) {
    var subMenuTitle = subMenuTitles[i];
    subMenuTitle.onclick = function () { this.blur(); return showMenu(this.id); }
  } //end for
} //end function
addLoadEvent(initiateMenu);