<script src="http://libs.baidu.com/jquery/1.9.1/jquery.min.js"></script>
   <form>
        <h3>Log in</h3>
        <input type="text" name="user" placeholder="user" id="user">
        <input type="password" name="pass" placeholder="password" id="pass">
        <input type="checkbox" id="remember" checked><br/><br/>
        <input type="button" value="登录" id="sub" onclick="loginBtn_click()">
    </form>
<script type="text/javascript">
    $(document).ready(function(){
        var strName = localStorage.getItem('UserName');
        var strPass = localStorage.getItem('UserPass');
        if(strName){
            $('#user').val(strName);
        }if(strPass){
            $('#pass').val(strPass);
        }
    });
    function loginBtn_click(){
        debugger
            var strName = $('#user').val();
            var strPass = $('#pass').val();
            localStorage.setItem('UserName',strName);
            if($('#remember').is(':checked')){
                localStorage.setItem('UserPass',strPass);
            }else{
                localStorage.removeItem('UserPass');
            }
            window.location.reload();
        }
</script>