<script src="js/jquery.min.js"></script>
        <script>

 //點選表單“提交”按鈕  
 $(function login(){
 $("#login").bind("click", function () {  
    var url = "${pageContext.request.contextPath}/checkLogin.action";  
    //更改form的action  
    $("#lginAndregist").attr("action", url);  
    //觸發submit事件，提交表單   
 

    $("#lginAndregist").submit();  
});  
 });


</script>
 <form action="" method="post" id="lginAndregist" name="lginAndregist">
                <input type="text" name="userName" class="userName" placeholder="userName">
                <input type="password" name="userPassword"
 
 class="userPassword" placeholder="userPassword">
                <button  id="login" onclick="login()">登入</button>
                <button  id="regist" onclick="regist()">註冊</button>
                <div class="error"><span>+</span></div>
            </form
 
>