$(document).ready(function(){
    $(window).bind("load", function() {
        $('#myGallery')
               .before(
                      '<div class="gallery-nav"><a href="javascript:;" class="prev">Anterior</a><a href="javascript:;" class="next">Siguiente</a></div>'
                 )
               .cycle({
                      timeout: 0,
                      next: '#galeria a.next',
                      prev: '#galeria a.prev'
                });
    });
});