本地存储之localStorage

        // localStorage使用示例
        var username = document.getElementById("username"); // 获取input username
        var userpwd = document.getElementById("userpassword"); // 获取input userpassword
        var remember = document.getElementById("remember"); // 获取记住账号密码
        // 点击复选框记住 账号、密码、复选框
        function rememberValue() {
            if (remember.checked == true) {
                localStorage.setItem('user', username.value);
                localStorage.setItem('pwd', userpwd.value);
                localStorage.setItem('remember', remember.checked);
            } else {
                localStorage.removeItem("user");
                localStorage.removeItem("pwd");
                localStorage.removeItem("remember");
                // localStorage.clear();// 全部删除
            }
        }
        // 页面加载完毕后从localStorage里读取值并填入相应的标签内
        window.onload = function () {
            username.value = localStorage.getItem("user");
            userpwd.value = localStorage.getItem("pwd");
            remember.checked = localStorage.getItem("remember");
        }