设置cookie

下午写了一个简单的访问cookie的对象，贴出来先

文件1： realwall.js

/*
 * 将访问cookie的方法封装到realwall对象里
 */
(function(window){
    var document = window.document;
    var realwall = {
        setCookie: function(name, value, expiredays){
            var cookieStr = encodeURIComponent(name) + "=" + encodeURIComponent(value),
                exDate = new Date();
            exDate.setDate(exDate.getDate() + expiredays);
            cookieStr += "; expires=" + exDate.toUTCString() + "; path=/";
            document.cookie = cookieStr;
        },
        getCookie: function(name){
            var cookieStr = document.cookie,
                start = cookieStr.indexOf(encodeURIComponent(name) + "="),
                end = 0;
            if(start > -1){
                end = cookieStr.indexOf(";", start);
                if(end == -1){
                    end = cookieStr.length;
                }
                var value = decodeURIComponent(cookieStr.substring(start + encodeURIComponent(name).length + 1, end));
                return value;
            }
        }
    };
    window.realwall = realwall;
})(window);

文件2：ts.js

/*
 * 调用realwall对象的方法，并在cookie中放入json格式数据，并读取之
 */
window.onload = function(){
    var value = prompt("Please input the value of name:");
    //在此输入：  {'aa':'hi'}
    realwall.setCookie("key", value, 2);
    var key= realwall.getCookie("key");
    var json = eval("(" + key+ ")");
    alert(json.aa);
}