親フォルダ
01.javascript: var u = (document.URL).replace(/^http(s)?:\/\//g, "");
02.var p = u.lastIndexOf("/");
03.var u = u.substr(0, p);
04.var a = prompt("検索文字列を入力してください", "");
05.if (a != "" && a != null) {
06.    a = encodeURIComponent(a);
07.    a = a.replace("\u0025\u0032\u0030", "+");
08.    a = "https://www.google.co.jp/search?q=" + a + "+site:" + u;
09.    window.open(a);
10.}
11.void(0);

サイト内 検索