var url = "http://www.kotobukiya.co.jp/square-enix/topimg/";
var sfx = ".png";
cat = new Array();

cat[0] = "http://www.kotobukiya.co.jp/square-enix/title_fma.shtml";
cat[1] = "http://www.kotobukiya.co.jp/square-enix/title_ff7ac.shtml";
cat[2] = "http://www.kotobukiya.co.jp/square-enix/title_ff10.shtml";
cat[3] = "http://www.kotobukiya.co.jp/square-enix/title_so4.shtml";
cat[4] = "http://www.kotobukiya.co.jp/square-enix/title_ff12.shtml";
cat[5] = "http://www.kotobukiya.co.jp/square-enix/title_ff12.shtml";
cat[6] = "http://www.kotobukiya.co.jp/square-enix/title_ff13.shtml";
cat[7] = "http://www.kotobukiya.co.jp/square-enix/title_ff13.shtml";
cat[8] = "http://www.kotobukiya.co.jp/square-enix/title_ff13.shtml";
cat[9] = "http://www.kotobukiya.co.jp/square-enix/title_ff13.shtml";

n = Math.floor(Math.random()*cat.length);
document.write("<a href='" + cat[n] + "'>" + "<img src='" + url + n + sfx + "' border='0'>" + "</a>");