function slideSwitch(){
 var $active = $('#slideshow img.active');
 var $next = $active.next();
 
 var $next =  $active.next().length ? $active.next(): $('#slideshow img:first'); 

 $active.addClass('last-active');
 
 $next.css({"display" : "none"})
      .addClass('active').css({"display" : "block"});
     
		  $active.removeClass('active last-active');

}

$(document).ready(function(){
      $(function(){
	  setInterval( "slideSwitch()", 5000 );
      });
});