function onChangeGallery(gallery_name)
{

$('#gallery_container').html(function() {
  var galleryContent = $.ajax({
      url: "default2011_galleries_" + gallery_name + ".aspx",
      global: true,
      type: "POST",
      data: ({id : gallery_name}),
      dataType: "text",
      async:false

   }).responseText;
  return galleryContent;
});

$('#id_of_gallery').gallery({
  interval: 4500,
  height: '322px',
  width: '575px',
  ratio: '1',
  thumbHeight: '55',
  thumbWidth: '55'
});

if (gallery_name == 'zones')
{
    $('#gallery_submenu_zones').removeClass("gallerySubmenuActive");
    $('#gallery_submenu_speakers').removeClass("gallerySubmenuActive");
    $('#gallery_submenu_students').removeClass("gallerySubmenuActive");
    $('#gallery_submenu_highlights').removeClass("gallerySubmenuActive");
    $('#gallery_submenu_zones').addClass("gallerySubmenuActive");
    $('#gallery_submenu_speakers').addClass("gallerySubmenu");
    $('#gallery_submenu_students').addClass("gallerySubmenu");
    $('#gallery_submenu_highlights').addClass("gallerySubmenu");
}
if (gallery_name == 'speakers')
{
    $('#gallery_submenu_zones').removeClass("gallerySubmenuActive");
    $('#gallery_submenu_speakers').removeClass("gallerySubmenuActive");
    $('#gallery_submenu_students').removeClass("gallerySubmenuActive");
    $('#gallery_submenu_highlights').removeClass("gallerySubmenuActive");
    $('#gallery_submenu_speakers').addClass("gallerySubmenuActive");
    $('#gallery_submenu_zones').addClass("gallerySubmenu");
    $('#gallery_submenu_students').addClass("gallerySubmenu");
    $('#gallery_submenu_highlights').addClass("gallerySubmenu");
}
if (gallery_name == 'students')
{
    $('#gallery_submenu_zones').removeClass("gallerySubmenuActive");
    $('#gallery_submenu_speakers').removeClass("gallerySubmenuActive");
    $('#gallery_submenu_students').removeClass("gallerySubmenuActive");
    $('#gallery_submenu_highlights').removeClass("gallerySubmenuActive");
    $('#gallery_submenu_students').addClass("gallerySubmenuActive");
    $('#gallery_submenu_zones').addClass("gallerySubmenu");
    $('#gallery_submenu_speakers').addClass("gallerySubmenu");
    $('#gallery_submenu_highlights').addClass("gallerySubmenu");
}
if (gallery_name == 'highlights')
{
    $('#gallery_submenu_zones').removeClass("gallerySubmenuActive");
    $('#gallery_submenu_speakers').removeClass("gallerySubmenuActive");
    $('#gallery_submenu_students').removeClass("gallerySubmenuActive");
    $('#gallery_submenu_highlights').removeClass("gallerySubmenuActive");
    $('#gallery_submenu_students').addClass("gallerySubmenu");
    $('#gallery_submenu_zones').addClass("gallerySubmenu");
    $('#gallery_submenu_speakers').addClass("gallerySubmenu");
    $('#gallery_submenu_highlights').addClass("gallerySubmenuActive");
}
}