//banner
var header_ads = new Array();
header_ads.push({'image':'http://www.youyoutokyo.jp/img/banner/banner_468x60_081001.gif','link_to':'../banner/tb081001.html'});
header_ads.push({'image':'http://www.youyoutokyo.jp/img/banner/banner_468x60_081002.gif','link_to':'../banner/tb081002.html'});
header_ads.push({'image':'http://www.youyoutokyo.jp/gb/img/banner/banner_468_60_090915.gif','link_to':'http://www.youyoutokyo.jp/gb/travel_tips/th1040.html'});
header_ads.push({'image':'http://www.youyoutokyo.jp/img/banner/banner_468x60_081004.gif','link_to':'../banner/tb081004.html'});
header_ads.push({'image':'http://www.youyoutokyo.jp/img/banner/banner_480x60_0904tb1010.gif','link_to':'http://kanichi.jp/?l=cn&m=pc&a=page_o_home'});
header_ads.push({'image':'http://www.youyoutokyo.jp/img/banner/banner_468x60_0904th1010.gif','link_to':'http://www.youyoutokyo.jp/gb/travel_tips/th1010.html'});
header_ads.push({'image':'http://www.youyoutokyo.jp/gb/img/banner/banner_468x60_0905th1020.gif','link_to':'http://www.youyoutokyo.jp/gb/travel_tips/th1020.html'});
//output
header_ads_id = Math.floor(Math.random()*header_ads.length);
document.write('<a href="'+header_ads[header_ads_id].link_to+'" target=_blank><img src="'+header_ads[header_ads_id].image+'" /></a>');