cookie方法封装（JS及jQUery）

            function addCookie(key, value, day, path, domain) {
                // 1.处理默认保存的路径
                var index = window.location.pathname.lastIndexOf("/")
                var currentPath = window.location.pathname.slice(0, index);
                path = path || currentPath;
                // 2.处理默认保存的domain
                domain = domain || document.domain;
                // 3.处理默认的过期时间
                if(!day){
                    document.cookie = key+"="+value+";path="+path+";domain="+domain+";";
                }else{
                    var date = new Date();
                    date.setDate(date.getDate() + day);
                    document.cookie = key+"="+value+";expires="+date.toGMTString()+";path="+path+";domain="+domain+";";
                }
            }
            function getCookie(key) {
                // console.log(document.cookie);
                var res = document.cookie.split(";");
                // console.log(res);
                for(var i = 0; i < res.length; i++){
                    // console.log(res[i]);
                    var temp = res[i].split("=");
                    // console.log(temp);
                    if(temp[0].trim() === key){
                        return temp[1];
                    }
                }
            }
            // 默认情况下只能删除默认路径中保存的cookie, 如果想删除指定路径保存的cookie, 那么必须在删除的时候指定路径才可以
            function delCookie(key, path) {
                addCookie(key, getCookie(key), -1, path);
            }

;(function ($, window) {
    $.extend({
        addCookie: function (key, value, day, path, domain) {
            // 1.处理默认保存的路径
            var index = window.location.pathname.lastIndexOf("/")
            var currentPath = window.location.pathname.slice(0, index);
            path = path || currentPath;
            // 2.处理默认保存的domain
            domain = domain || document.domain;
            // 3.处理默认的过期时间
            if(!day){
                document.cookie = key+"="+value+";path="+path+";domain="+domain+";";
            }else{
                var date = new Date();
                date.setDate(date.getDate() + day);
                document.cookie = key+"="+value+";expires="+date.toGMTString()+";path="+path+";domain="+domain+";";
            }
        },
        getCookie:function (key) {
            // console.log(document.cookie);
            var res = document.cookie.split(";");
            // console.log(res);
            for(var i = 0; i < res.length; i++){
                // console.log(res[i]);
                var temp = res[i].split("=");
                // console.log(temp);
                if(temp[0].trim() === key){
                    return temp[1];
                }
            }
        },
        delCookie:function (key, path) {
            addCookie(key, getCookie(key), -1, path);
        }
    });
})(jQuery, window);