$( function() {
    
    $('#head-body .alternate').css({display:'block', opacity:0}).animate({opacity:0},3000).animate({opacity:1},5000);
   
    //pretty photo
    $("a[href$=jpg]").not("a[rel]").attr('rel','gallery[x]');
    $("a[rel^=gallery]").prettyPhoto({animationSpeed:'slow',slideshow:5000, autoplay_slideshow: false}); 
});