"

From 2010.igem.org

/**

* Cookie plugin
*
* Copyright (c) 2006 Klaus Hartl (stilbuero.de)
* Dual licensed under the MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
*
*/

/**

* Create a cookie with the given name and value and other optional parameters.
*
* @example $.cookie('the_cookie', 'the_value');
* @desc Set the value of a cookie.
* @example $.cookie('the_cookie', 'the_value', { expires: 7, path: '/', domain: 'jquery.com', secure: true });
* @desc Create a cookie with all available options.
* @example $.cookie('the_cookie', 'the_value');
* @desc Create a session cookie.
* @example $.cookie('the_cookie', null);
* @desc Delete a cookie by passing null as value. Keep in mind that you have to use the same path and domain
*       used when the cookie was set.
*
* @param String name The name of the cookie.
* @param String value The value of the cookie.
* @param Object options An object literal containing key/value pairs to provide optional cookie attributes.
* @option Number|Date expires Either an integer specifying the expiration date from now on in days or a Date object.
*                             If a negative value is specified (e.g. 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.
* @option String path The value of the path atribute of the cookie (default: path of page that created the cookie).
* @option String domain The value of the domain attribute of the cookie (default: domain of page that created the cookie).
* @option Boolean secure If true, the secure attribute of the cookie will be set and the cookie transmission will
*                        require a secure protocol (like HTTPS).
* @type undefined
*
* @name $.cookie
* @cat Plugins/Cookie
* @author Klaus Hartl/klaus.hartl@stilbuero.de
*/

/**

* Get the value of a cookie with the given name.
*
* @example $.cookie('the_cookie');
* @desc Get the value of a cookie.
*
* @param String name The name of the cookie.
* @return The value of the cookie.
* @type String
*
* @name $.cookie
* @cat Plugins/Cookie
* @author Klaus Hartl/klaus.hartl@stilbuero.de
*/

jQuery.cookie = function(name, value, options) {

   if (typeof value != 'undefined') { // name and value given, set cookie
       options = options || {};
       if (value === null) {
           value = ;
           options.expires = -1;
       }
       var expires = ;
       if (options.expires && (typeof options.expires == 'number' || options.expires.toUTCString)) {
           var date;
           if (typeof options.expires == 'number') {
               date = new Date();
               date.setTime(date.getTime() + (options.expires * 24 * 60 * 60 * 1000));
           } else {
               date = options.expires;
           }
           expires = '; expires=' + date.toUTCString(); // use expires attribute, max-age is not supported by IE
       }
       // CAUTION: Needed to parenthesize options.path and options.domain
       // in the following expressions, otherwise they evaluate to undefined
       // in the packed version for some reason...
       var path = options.path ? '; path=' + (options.path) : ;
       var domain = options.domain ? '; domain=' + (options.domain) : ;
       var secure = options.secure ? '; secure' : ;
       document.cookie = [name, '=', encodeURIComponent(value), expires, path, domain, secure].join();
   } else { // only name given, get cookie
       var cookieValue = null;
       if (document.cookie && document.cookie != ) {
           var cookies = document.cookie.split(';');
           for (var i = 0; i < cookies.length; i++) {
               var cookie = jQuery.trim(cookies[i]);
               // Does this cookie string begin with the name we want?
               if (cookie.substring(0, name.length + 1) == (name + '=')) {
                   cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
                   break;
               }
           }
       }
       return cookieValue;
   }

};