$(function(){
 $len = $("#flash").find(".ad").length; $("#next").click(function(){
	$(".ad").each(function(){
		$state = $(this).css("display");
		if($state=="block"){
           $this = $(this);
		}
	});    if($this.next().html()==""){
	  $this.hide();
      $this = $(".ban01");
	  $(".ban01").show();
	  $id_name = $this.attr("id");
	   var pre = /\d/;
	  var metches = pre.exec($id_name);
	  $new_id = metches[0];
	  $("#f"+$new_id).attr("class","dq");
	  $("#f"+$new_id).siblings().attr("class","no");
	}else{
      $this.hide().next().show();
      $id_name = $this.next().attr("id");
	  var pre = /\d/;
	  var metches = pre.exec($id_name);
	  $new_id = metches[0];
	  $("#f"+$new_id).attr("class","dq");
	  $("#f"+$new_id).siblings().attr("class","no");
	}
 });
 $("#prev").click(function(){
	$(".ad").each(function(){
		$state = $(this).css("display");
		if($state=="block"){
           $this = $(this);
		}
	});
    if($this.prev().html()==""){
       $this.hide();
       $this = $(".ban03");
	   $(".ban03").show();
	   $id_name = $this.attr("id");
	   var pre = /\d/;
	  var metches = pre.exec($id_name);
	  $new_id = metches[0];
	  $("#f"+$new_id).attr("class","dq");
	  $("#f"+$new_id).siblings().attr("class","no");
	}else{
      $this.hide().prev().show();
	  $id_name = $this.prev().attr("id");
	  var pre = /\d/;
	  var metches = pre.exec($id_name);
	  $new_id = metches[0];
	  $("#f"+$new_id).attr("class","dq");
	  $("#f"+$new_id).siblings().attr("class","no");
	}
 });
})