$(document).ready(
  function() {
    // Collapsible fieldsets
    $("form.collapsible div.collapsed").hide();
    $("form.collapsible legend").css({
      backgroundImage: "url(/images/fieldset-collapsible-collapsed.gif)"
    });
    $("form.collapsible legend").toggle(
      function () {
        $(this).css({backgroundImage: "url(/images/fieldset-collapsible-expanded.gif)"});
        $(this).next(".collapsed").slideDown().addClass("expanded").removeClass("collapsed");
      },
      function () {
        $(this).css({backgroundImage: "url(/images/fieldset-collapsible-collapsed.gif)"});        
        $(this).next(".expanded").slideUp().removeClass("expanded").addClass("collapsed");
      }
    );
  }
);