diff --git a/ext/B_cookies.js b/ext/B_cookies.js
new file mode 100644
index 0000000..c055f5e
--- /dev/null
+++ b/ext/B_cookies.js
@@ -0,0 +1,39 @@
+var docCookies = {
+  getItem: function (sKey) {
+    if (!sKey) { return null; }
+    return decodeURIComponent(document.cookie.replace(new RegExp("(?:(?:^|.*;)\\s*" + encodeURIComponent(sKey).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=\\s*([^;]*).*$)|^.*$"), "$1")) || null;
+  },
+  setItem: function (sKey, sValue, vEnd, sPath, sDomain, bSecure) {
+    if (!sKey || /^(?:expires|max\-age|path|domain|secure)$/i.test(sKey)) { return false; }
+    var sExpires = "";
+    if (vEnd) {
+      switch (vEnd.constructor) {
+        case Number:
+          sExpires = vEnd === Infinity ? "; expires=Fri, 31 Dec 9999 23:59:59 GMT" : "; max-age=" + vEnd;
+          break;
+        case String:
+          sExpires = "; expires=" + vEnd;
+          break;
+        case Date:
+          sExpires = "; expires=" + vEnd.toUTCString();
+          break;
+      }
+    }
+    document.cookie = encodeURIComponent(sKey) + "=" + encodeURIComponent(sValue) + sExpires + (sDomain ? "; domain=" + sDomain : "") + (sPath ? "; path=" + sPath : "") + (bSecure ? "; secure" : "");
+    return true;
+  },
+  removeItem: function (sKey, sPath, sDomain) {
+    if (!this.hasItem(sKey)) { return false; }
+    document.cookie = encodeURIComponent(sKey) + "=; expires=Thu, 01 Jan 1970 00:00:00 GMT" + (sDomain ? "; domain=" + sDomain : "") + (sPath ? "; path=" + sPath : "");
+    return true;
+  },
+  hasItem: function (sKey) {
+    if (!sKey) { return false; }
+    return (new RegExp("(?:^|;\\s*)" + encodeURIComponent(sKey).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=")).test(document.cookie);
+  },
+  keys: function () {
+    var aKeys = document.cookie.replace(/((?:^|\s*;)[^\=]+)(?=;|$)|^\s*|\s*(?:\=[^;]*)?(?:\1|$)/g, "").split(/\s*(?:\=[^;]*)?;\s*/);
+    for (var nLen = aKeys.length, nIdx = 0; nIdx < nLen; nIdx++) { aKeys[nIdx] = decodeURIComponent(aKeys[nIdx]); }
+    return aKeys;
+  }
+};