jquery cookie 存取json jquery获取cookie的值

*/


    function getcookie(name, dc){  

        var cname = name + "=";

        if (dc.length > 0){  

            var begin = dc.indexof(cname);

            if (begin != -1){  

                begin += cname.length;  

                end = dc.indexof(",", begin);  

                if (end == -1){  

                    end = dc.length;  

                }  

                return dc.substring(begin, end);  

            }  

        }  

        return null;  

    } 


//jquery取值比较简单，因为他有个自带函数


    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

            }

            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;

        }

    };


//使用方法


    $.cookie('the_cookie', 'the_value', { expires: 7, path: '/', domain: '3ppt.com', secure: true });