var _banner_num = 4; //バナーの種類数
var _brand= "ro";
var _r = 1;//Math.floor(Math.random() *_banner_num);
var _url = "http://www.nissinfoods.jp/?xadid=";
var _xadid=["0083N","0084N","0085N","0086N"];

var _banner  = '<a href='+ _url + _xadid[_r] +' target="_blank"><img src="http://www.nissinfoods.jp/banner/images/'+ _brand +'_'+ (_r+1) +'.gif" alt="麺好き集まれ！NOODLE+" width="153" height="38" /></a>';
document.write(_banner);