jQuery(document).ready(function () {
  jQuery('LI.drawer UL:not(:first)').hide(); // hide all ULs inside LI.drawer except the first one
  jQuery('H2.drawer-handle').click(function () {
    // hide all the drawer contents
    jQuery('LI.drawer UL:visible').slideUp().prev().removeClass('open');
    // show the associated drawer content to 'this' (this is the current H2 element)
    // since the drawer content is the next element after the clicked H2, we find
    // it and show it using this:
    jQuery(this).addClass('open').next().slideDown();
  });
});