// JScript 文件

var middle_advertisement_position=1;
var middle_advertisement_autotimer=null;

function change_middle_advertisement(id){
	id=parseInt(id);
	if(id>3 || id <1){
		id=1;
	}
	$("div_middle_advertisement"+middle_advertisement_position).style.display="none";
	$("div_btn_middle_advertisement"+middle_advertisement_position).className="buttondiv2";
	$("div_middle_advertisement"+id).style.display="block";
	$("div_btn_middle_advertisement"+id).className="buttondiv";
	middle_advertisement_position=id;
}

function auto_refresh_middle_advertisement(){
	middle_advertisement_autotimer=setInterval(function(){change_middle_advertisement(middle_advertisement_position+1);},5000);
}

function stop_refresh_middle_advertisement(){
	clearInterval(middle_advertisement_autotimer);
	middle_advertisement_autotimer=null
}

auto_refresh_middle_advertisement();