$(function(){

   var first_quote = current_quote = $(".quote_module .quote").first();
   $(".quote_module .quote").hide();
   $(current_quote).show();

   function fade_quote(){
      $(current_quote).fadeOut(1000);
      var next_quote = $(current_quote).next(".quote");
      if($(next_quote).length == 0)
         next_quote = first_quote;
      $(next_quote).fadeIn(1000);
      current_quote = next_quote;
   }

   setInterval(fade_quote, 10000);

});