$(function(){
           $('.banner_btn').css("paddingLeft",830-$('.flash_btn').find('span').length*23);
		   $('.banner_btn').css('top',$('.banner_div').offset().top+309);
		   for(i=0;i<$('.banner_btn').find('span').length;i++){
			    $('.banner_btn').find('span').eq(i).bind("click",{index:i},flash_banner_fun);
			   }
		   timerID = setInterval("flash_banner_fun1()",5000);
})

var index_img_num5=0;
function flash_banner_fun(event){
	   clearInterval(timerID);
	   index_img_num5=event.data.index;
	   $('.banner_btn').find('span').removeClass("span_now");
	   $('.banner_btn').find('span').eq(event.data.index).addClass("span_now");
	   $('.banner_div').stop();
	   $('.banner_div').animate({scrollTop: event.data.index*331}, "slow");
	   timerID = setInterval("flash_banner_fun1()",5000);
	}
function flash_banner_fun1(){
	  if(index_img_num5<4){
	      index_img_num5++;
	  }else{
		  index_img_num5=0;
		  }
	  $('.banner_btn').find('span').removeClass("span_now");
	  $('.banner_btn').find('span').eq(index_img_num5).addClass("span_now");
	  var aaa=331*index_img_num5;
	  $('.banner_div').stop();
	  $('.banner_div').animate({scrollTop: aaa}, "slow");
	}