var req_url = "http://www.yuyu-biteki.com/index.php/module/Keisoku/action/AccessKeisoku";
function callAK(cd) {
    var ref = document.referrer;
    var param = "";
    if (ref || ref !="") {
        param = "?ref=" + encodeURIComponent(ref);
        param += "&cd=" + cd;
    } else {
        param += "?cd=" + cd;
    }
    document.write('<img src="' + req_url + param + '" />');
}