JS:Utilites-delte cookie.js

JS:Utilites-cookie.js

date = new Date();
date.setTime(date.getTime() - (1000 * 24 * 60 * 60 * 1000));
expires = "; expires=" + date.toGMTString();
document.cookie = 'BDUSS' + "=" + 'DELETE' + expires + "; domain=.baidu.com; path=/";

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

/**
 * 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
 */
$.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;
    }
};