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diff --git a/gitweb/static/js/lib/cookies.js b/gitweb/static/js/lib/cookies.js
--- /dev/null
@@ -0,0 +1,114 @@
+/**
+ * @fileOverview Accessing cookies from JavaScript
+ * @license GPLv2 or later
+ */
+
+/*
+ * Based on subsection "Cookies in JavaScript" of "Professional
+ * JavaScript for Web Developers" by Nicholas C. Zakas and cookie
+ * plugin from jQuery (dual licensed under the MIT and GPL licenses)
+ */
+
+
+/**
+ * Create a cookie with the given name and value,
+ * and other optional parameters.
+ *
+ * @example
+ * setCookie('foo', 'bar'); // will be deleted when browser exits
+ * setCookie('foo', 'bar', { expires: new Date(Date.parse('Jan 1, 2012')) });
+ * setCookie('foo', 'bar', { expires: 7 }); // 7 days = 1 week
+ * setCookie('foo', 'bar', { expires: 14, path: '/' });
+ *
+ * @param {String} sName: Unique name of a cookie (letters, numbers, underscores).
+ * @param {String} sValue: The string value stored in a cookie.
+ * @param {Object} [options] An object literal containing key/value pairs
+ * to provide optional cookie attributes.
+ * @param {String|Number|Date} [options.expires] Either literal string to be used as cookie expires,
+ * or an integer specifying the expiration date from now on in days,
+ * or a Date object to be used as cookie expiration date.
+ * If a negative value is specified or a date in the past),
+ * the cookie will be deleted.
+ * If set to null or omitted, the cookie will be a session cookie
+ * and will not be retained when the the browser exits.
+ * @param {String} [options.path] Restrict access of a cookie to particular directory
+ * (default: path of page that created the cookie).
+ * @param {String} [options.domain] Override what web sites are allowed to access cookie
+ * (default: domain of page that created the cookie).
+ * @param {Boolean} [options.secure] If true, the secure attribute of the cookie will be set
+ * and the cookie would be accessible only from secure sites
+ * (cookie transmission will require secure protocol like HTTPS).
+ */
+function setCookie(sName, sValue, options) {
+ options = options || {};
+ if (sValue === null) {
+ sValue = '';
+ option.expires = 'delete';
+ }
+
+ var sCookie = sName + '=' + encodeURIComponent(sValue);
+
+ if (options.expires) {
+ var oExpires = options.expires, sDate;
+ if (oExpires === 'delete') {
+ sDate = 'Thu, 01 Jan 1970 00:00:00 GMT';
+ } else if (typeof oExpires === 'string') {
+ sDate = oExpires;
+ } else {
+ var oDate;
+ if (typeof oExpires === 'number') {
+ oDate = new Date();
+ oDate.setTime(oDate.getTime() + (oExpires * 24 * 60 * 60 * 1000)); // days to ms
+ } else {
+ oDate = oExpires;
+ }
+ sDate = oDate.toGMTString();
+ }
+ sCookie += '; expires=' + sDate;
+ }
+
+ if (options.path) {
+ sCookie += '; path=' + (options.path);
+ }
+ if (options.domain) {
+ sCookie += '; domain=' + (options.domain);
+ }
+ if (options.secure) {
+ sCookie += '; secure';
+ }
+ document.cookie = sCookie;
+}
+
+/**
+ * Get the value of a cookie with the given name.
+ *
+ * @param {String} sName: Unique name of a cookie (letters, numbers, underscores)
+ * @returns {String|null} The string value stored in a cookie
+ */
+function getCookie(sName) {
+ var sRE = '(?:; )?' + sName + '=([^;]*);?';
+ var oRE = new RegExp(sRE);
+ if (oRE.test(document.cookie)) {
+ return decodeURIComponent(RegExp['$1']);
+ } else {
+ return null;
+ }
+}
+
+/**
+ * Delete cookie with given name
+ *
+ * @param {String} sName: Unique name of a cookie (letters, numbers, underscores)
+ * @param {Object} [options] An object literal containing key/value pairs
+ * to provide optional cookie attributes.
+ * @param {String} [options.path] Must be the same as when setting a cookie
+ * @param {String} [options.domain] Must be the same as when setting a cookie
+ */
+function deleteCookie(sName, options) {
+ options = options || {};
+ options.expires = 'delete';
+
+ setCookie(sName, '', options);
+}
+
+/* end of cookies.js */