standalone utility for getting/setting/deleting cookies

cookie.js

/*
 *  Cookie Manager
 *  Written in plain 'ole Javascript but based on Klaus Hartl's jQuery cookie plugin
 *  
 *  Copyright (c) 2011 Rob Flaherty (@ravelrumba)  
 *  Copyright (c) 2010 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
 *  
 *  Example Usage:
 *    
 *  Get Cookie Value:
 *    cookie('name');
 *    
 *  Set Session Cookie:
 *    cookie('name', 'value');
 *    
 *  Set Cookie with options:
 *    cookie('name', 'value', { expires: 1, path: '/', domain: 'example.com', secure: true });
 *    NOTE: Expiration time set in one-hour intervals    
 *
 *  Delete Cookie:
 *    cookie('name', null);
 *
 */
 
var cookie = function (key, value, options) {
  var expiration, time, result;
  
  if (arguments.length > 1 && String(value) !== "[object Object]") {
    options = options || {};
    
    if (value === null || value === undefined) {
      options.expires = -1;
    }

    if (typeof options.expires === 'number') {
      expiration = options.expires;
      time = options.expires = new Date();
      time.setTime(time.getTime() + expiration * 60 * 60 * 1000);
    }
      
    return (document.cookie = [
      encodeURIComponent(key), '=',
      encodeURIComponent(value),
      options.expires ? '; expires=' + options.expires.toUTCString() : '',
      options.path ? '; path=' + options.path : '',
      options.domain ? '; domain=' + options.domain : '',
      options.secure ? '; secure' : ''
    ].join(''));
  }

  result = new RegExp('(?:^|; )' + encodeURIComponent(key) + '=([^;]*)').exec(document.cookie);  
  return result ? decodeURIComponent(result[1]) : null;
};