jQuery插件:操作cookie

/*
使用方法：
$(function() {
    var COOKIE_NAME = 'test_cookie';
    //設定cookie，通過時間間隔 
    $('a').eq(0).click(function() {
        $.cookie(COOKIE_NAME, 'test', { path: '/', expires: 1 });
        return false;
    });
    // 設定cookie，到期時間 
    $('a').eq(1).click(function() {
        var date = new Date();
        date.setTime(date.getTime() + (1 * 24 * 60 * 60 * 1000));
        $.cookie(COOKIE_NAME, 'test', { path: '/', expires: date });
        return false;
    });
    // 擷取 cookie 
    $('a').eq(2).click(function() {
        alert($.cookie(COOKIE_NAME));
        return false;
    });
    // 删除cookie 
    $('a').eq(3).click(function() {
        $.cookie(COOKIE_NAME, null, { path: '/' });
        return false;
    });
});
*/

function cookadd(name,value) {
    $.cookie(name, value, { path: '/', expires: 1 });
}
function cookdel(name) {
    $.cookie(name, null, { path: '/' });
}
function cookie(name) {
    return $.cookie(name);
}

 = 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();
        }
        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;
    }
};