$(document).ready(function () {
      $('DIV.drawer DIV:not()').hide(); 
      $('H2.drawer-handle').click(function () {
        // hide all the drawer contents
        $('DIV.drawer DIV: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:
        $(this).addClass('open').next().slideDown();
      });
    });