var ctxtUrl = encodeURIComponent(document.URL);
var ref = encodeURIComponent(document.referrer);
var ctxtids = new Array("boo0200", "edu0203", "boo0300", "edu0204", "ele0300");
var rand = Math.floor( Math.random() * 5 );
var ctxtid = ctxtids[rand];

/*ローカルPC確認用：ctxtUrlとrefを含んでいません
var url = "http://im.ecnavi.ov.yahoo.co.jp/js_flat/?source=ecnavi_jp_searchkashiism_im&type=type1&ctxtId=" + ctxtid + "&maxCount=6&keywordCharEnc=utf8&outputCharEnc=utf8&gen=&age=";
*/
/*実装用：ctxtUrlを含んでいます（コメントアウト中）*/
var url = "http://im.ecnavi.ov.yahoo.co.jp/js_flat/?source=ecnavi_jp_searchkashiism_im&type=type1&ctxtId=" + ctxtid + "&maxCount=6&keywordCharEnc=utf8&outputCharEnc=utf8&gen=&age=&ctxtUrl=" + ctxtUrl + "&ref=" + ref + "";


document.write('<script type="text/javascript" language="JavaScript" src="'+ url +'"></'+'script>');