dojo.Post提交数据，火狐提交不了，似乎是在按了button之后执行了默认行为，但是我明明禁止了。 - 编程论坛

程序代码：

<body>

<center>
<form id="registForm" method="post">
<table>

    <tr>
        <td><label for="name">手机号：</label></td>
        <td><input dojoType="dijit.form.TextBox" type="text" id="name" name="name"/></td>
    </tr>
    <tr>
        <td><label for="nickname">昵称：</label></td>
        <td><input dojoType="dijit.form.TextBox" type="text" id="nickname" name="nickname"/></td>
    </tr>
    <tr>
        <td><label for="password">密码：</label></td>
        <td><input dojoType="dijit.form.TextBox" type="password" id="password" name="password"/></td>
    </tr>
    <tr>
        <td><label for="password-2">确认密码：</label></td>
        <td><input dojoType="dijit.form.TextBox" type="password" id="password-2"name="password-2"/>


        </td>
    </tr>
    <tr>
        <td><label for="email">e-mail：</label></td>
        <td><input dojoType="dijit.form.TextBox" type="text" id="email" name="email"/></td>
    </tr>
</table>
<div id="passWdError" class="error"> </div>
<button dojoType="dijit.form.Button" id="formBtn" onclick="sendForm()">提交</button>
</form>
</center>

<script type="text/javascript">

function sendForm()
{
    if(event && event.preventDefault)
    {
        //阻止默认浏览器动作(W3C)
        event.preventDefault();
        event.stopPropagation();
    }
    else
    {
        //IE中阻止函数器默认动作的方式
            window.event.returnValue = false;
        window.event.cancelBubble = true;
        }

    var datatopost=
    {
        "name":""+document.getElementById('name').value,
        "nickname":""+document.getElementById('nickname').value,
        "password":""+document.getElementById('password').value,
        "email":""+document.getElementById('email').value
    };

        var kw =
        {
            postData:dojo.toJson(datatopost),
            url: "http://localhost:8080/mm/rest/register",    //表单要提交到的URL
            handleAs:"json",  //返回值的处理方式
            headers: {"Content-Type": "application/json; charset=utf-

8","Accept":"application/json"},
            load: function(response)
            {
                alert("Response from server:" + response.id

+"-"+response.privacy_policy);
            },
            error: function(error)
            {
                alert("An error occurred:"+error);
            },
            timeout:5000//超时时间
        };
        dojo.xhrPost(kw);
}
</script>
</body>
</html>

请问这样有问题吗，该怎样解决？