$(document).ready(function() { 
    $('#slideshow').cycle({ 
        fx:      'fade',
				speed:  3000,
        timeout:  7000, 
        before:   onBefore 
    }); 
 
    var slidesAdded = false; 
     
    function onBefore(curr, next, opts) { 
        if (!opts.addSlide || slidesAdded) 
            return; 
         
        for (var i=3; i <= 13; i++) 
            opts.addSlide( '<img src="img/'+i+'.jpg" />' ); 
        slidesAdded = true; 
    }; 
});