jquery获取cookie值的代码实例

*/

    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 });