str = new Array(
"<a href=\"kyodosha/index.html\"><img src=\"img/kyoudou-sya.jpg\" width=\"568\" height=\"256\" alt=\"共働舎\" /></a>",
"<a href=\"hanamura/index.html\"><img src=\"img/hanamura.jpg\" width=\"568\" height=\"256\" alt=\"Shop花郷\" /></a>",
"<a href=\"hataraki/index.html\"><img src=\"img/hataraki-honpo.jpg\" width=\"568\" height=\"256\" alt=\"はたらき本舗\" /></a>",
"<a href=\"ghwith/index.html\"><img src=\"img/with.jpg\" width=\"568\" height=\"256\" alt=\"グループホームウィズ\" /></a>",
"<a href=\"careplaza_kamikurata/index.html\"><img src=\"img/chiiki_care.jpg\" width=\"568\" height=\"256\" alt=\"地域ケアプラザ\" /></a>",
"<a href=\"comuhouse/index.html\"><img src=\"img/comm_house.jpg\" width=\"568\" height=\"256\" alt=\"倉田コミュニティハウス\" /></a>",
"<img src=\"img/hiraku-kai_img.jpg\" width=\"568\" height=\"256\" alt=\"開く会\" />"
);
document.write(str[Math.floor(Math.random()*str.length)]);