jquery.cookie.js的介绍与使用方法

$.cookie('the_cookie','the_value',{
  expires:7, 
  path:'/',
  domain:'jquery.',
  secure:true
})　

$.cookie('the_cookie', 'the_value');

$.cookie('the_cookie', 'the_value', {expires: 7});

$.cookie('the_cookie');

$.cookie('the_cookie', null);

/
  Cookie plugin
 
  Copyright (c) 2006 Klaus Hartl (stilbuero.de)
  Dual licensed under the MIT and GPL licenses:
  http://.opensource./licenses/mit-license.php
  http://.gnu./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.', 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 = $.extend({}, options); // clone object since it's unexpected behavior if the expired property were changed
  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
 }
 // NOTE 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;
 }
};