function random_btn() {
banner = new Array();
banner[0] = "/shared/bnr/32sunnylife_yahatahigashi125x125.jpg";
banner[1] = "/shared/bnr/36sunnylife_chuoumachi125x125.jpg";
banner[2] = "/shared/bnr/37sunnylife_sangamori125x125.jpg";
banner[3] = "/shared/bnr/252ariake_omuta125x125.jpg";
banner[4] = "/shared/bnr/355luck_hara125x125.jpg";
banner[5] = "/shared/bnr/371luck_ooitamgfhall125x125.jpg";

link = new Array();
link[0] = "/hall/detail/SAIJOCD/32";
link[1] = "/hall/detail/SAIJOCD/36";
link[2] = "/hall/detail/SAIJOCD/37";
link[3] = "/hall/detail/SAIJOCD/252";
link[4] = "/hall/detail/SAIJOCD/355";
link[5] = "/hall/detail/SAIJOCD/371";
rand = Math.floor(Math.random()*banner.length);
document.write("<a href="+link[rand]+"><img src="+banner[rand]+" style='border-style:none'></a>");
}