$(function() {
  /* Delete Buttons */
  $('.delete_button').click(function() {
    return confirm("Are you sure you want to delete this?");
  });
  /* Rollovers */
  $('.rollover').hover(
    function() {
      $(this).attr('src', $(this).attr('src').replace('_off', '_over'));
    },
    function() {
      $(this).attr('src', $(this).attr('src').replace('_over', '_off'));
    }
  );
  if ($('.message_nav img.rollover').length > 0) {
    $('.messages_nav').hover(
      function() {
         $(this).find('img').attr('src', $(this).find('img').attr('src').replace('_off', '_over'));
         $(this).find('span').addClass("no_messages_hover");
      },
      function() {
         $(this).find('img').attr('src', $(this).find('img').attr('src').replace('_over', '_off'));
         $(this).find('span').removeClass("no_messages_hover");
      }
    );
  }
})