$(document).ready(function() {
$('#leftpanel .show').delay(1500);
slideShow(); 
}); 

function slideShow() { 
var current = $('#leftpanel .show'); 
var next = current.next().length ? current.next() : current.parent().children(':first');
current.fadeOut(2500, function () {current.removeClass('show'); next.fadeIn(6000).addClass('show');} );

 

setTimeout(slideShow,6000);}