<script type="text/javascript">
        // 验证当前的浏览器是否支持localStorage和sessionStorage
        window.onload = function(){
            if (window.localStorage && window.sessionStorage) {
                alert("你的浏览器支持localStorage和sessionStorage");
            }
        }
    </script>

<script type="text/javascript">
        // 创建均使用localStorage做示例，sessionStorage语法方式和localStorage是一样的，localStorage(key, value);或者localStorage.key = "value";
        window.onload = function(){
            if (window.localStorage) {
                localStorage.setItem("userName", "张三");
            }
        }
    </script>

<script type="text/javascript">
        // 可以直接使用localStorage.getItem(key);也可以使用localStorage.key;
        window.onload = function(){
            if (window.localStorage && window.sessionStorage) {
                localStorage.setItem("userName", "张三");
                alert(localStorage.getItem("userName"));

            }
        }
    </script>

<script type="text/javascript">
        // localStorage.removeItem(key):根据键名删除指定存储，localStorage.clear():删除指定所有存储，当Storage对象为空时，也是可执行的。
        window.onload = function(){
            if (window.localStorage && window.sessionStorage) {
                localStorage.setItem("userName", "hello,world!");
　　             localStorage.removeItem("userName");
                localStorage.clear();
            }
        }
    </script>