(function($) {       
	$.fn.slider = function(options) {
  
		var defaults = {    
			timeout: 5000    
		};
		var opts = $.extend(defaults, options); 
		
		return this.each(function() {
			var cu = $(this).children('ul');
			var culi = cu.children('li');
			var now=0;
			culi.eq(now).css("z-index",6);
			setInterval(function (){
				var pre = now===0?culi.length-1:now-1;
				var nxt = now===culi.length-1?0:now+1;
				culi.eq(nxt).css("z-index",5).show();
				culi.eq(now).fadeOut(300,function(){
					culi.eq(now).css("z-index",1);
					culi.eq(nxt).css("z-index",6).show();
					now=nxt;
			  	});
			},opts.timeout);

		});
	};     
})(jQuery);