#gallery-1 { margin: auto; } #gallery-1 .gallery-item { float: left; text-align: center; margin: 0; width: 33%; } jQuery(document).ready(function(){ jQuery("#gallery-1 a[rel^='prettyPhoto']").prettyPhoto({animation_speed:'normal',theme:'light_square',slideshow:3000, autoplay_slideshow: false}); }); 