jquery操作cookie插件分享

jQuery.cookie = function(name, value, options) {
    if (typeof value != undefined) {
        options = options || {};
        if (value === null) {
            value = ;
            options = $.extend({}, options);
            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();
        }
        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 {
        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]);
                if (cookie.substring(0, name.length + 1) == (name + =)) {
                    cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
                    break;
                }
            }
        }
        return cookieValue;
    }
};