var lastOpenedMenu = "";

/****************************************************************
 * The Site is coded to have hard links for older browsers which
 * do not support Javascript.  This script then goes back in and
 * modifies the menus to create the collapsable effect.
 ****************************************************************
 */

function initMenu(strID) {
  collapseItem('SubMenuA');
  collapseItem('SubMenuB');
  collapseItem('SubMenuC');
  collapseItem('SubMenuD');

  if (strID != 'none') {
    toggleItem(strID);
  }
}

function toggleItem(strID) {
  if (lastOpenedMenu == strID) {
    collapseItem(strID);
    lastOpenedMenu = "";
  }
  else if (lastOpenedMenu == "") {
    expandItem(strID);
    lastOpenedMenu = strID;
  }
  else {
    collapseItem(lastOpenedMenu);
    expandItem(strID);
    lastOpenedMenu = strID;
  }
}

function collapseItem(strID) {
  document.getElementById(strID).style.display = "none";
}

function expandItem(strID) {
  document.getElementById(strID).style.display = "block";
}