jquery - 如何防止 jquery ui 对话框在按 Enter 键时关闭

Question

我的 HTML 定义如下:

忘记密码

<div id='dialog-form-lostpass' title='password recovery' class='hidden lsdialog'>
    <p id='explain'>Please enter your username or email address. We will then immediately mail your
        password to your registered email address</p>
    <p id='progress'></p>
    <form>
        <fieldset>
            <label for='username'>username or email</label><br />
            <input type='text' name='username' id='username' class='text ui-widget-content ui-corner-all' /><br />
        </fieldset>
    </form>
</div>

脚本:

 $(document).ready(function() {
    $(":button#forgotpassword").click(function() { //* open dialog to retreive user's password
        $("#dialog-form-lostpass").find("p[id=progress]").text(null); //* reset progress
        $("#dialog-form-lostpass").dialog("open");
        return false;
    });

    $("#dialog-form-lostpass").dialog({
        autoOpen: false,
        modal: true,
        buttons: {
            "mail password": function() {
                $("#dialog-form-lostpass").find("p[id=progress]").html("<img src='images/wait.gif' height=10>Contacting Linkshelf Server...");

                $.post(options.engine, {
                    command: "retreivepassword",
                    username: $("#dialog-form-lostpass").find("input[id=username]").val(),
                }, function(data) {
                    if (data.success) {
                        $("#dialog-form-lostpass").dialog("close");
                        $("#loginscreen").find("p[id=progress]").text("Your password is sent to your registered email address. You should receive an email from us soon. Make sure there is no spam-filter blocking our email.").addClass("ui-state-error").removeClass("ui-state-error", 1700);
                    } else {
                        if (data.feedback == "invalid entry") {
                            $("dialog-form-lostpass").find("p[id=progress]").text("Invalid entry. You didn't provide us with enough information to retreive your password").addClass("ui-state-error").removeClass("ui-state-error", 1700);
                        } else {
                            $("#dialog-form-lostpass").find("p[id=progress]").text("Unknown username and/or email address. We can not retreive your password").addClass("ui-state-error").removeClass("ui-state-error", 1700);
                        }
                    }
                }, "json");
            }
        },
    });

});

现在，当我点击“忘记密码”按钮时，我会看到一个对话框(在 this fiddle 上检查它，布局看起来很糟糕，但您会明白的)。当我点击 ESC 时，我回到初始屏幕，当我点击“邮件密码”时，没有任何意外发生，但是当我点击“回车”时，浏览器会加载不同的位置，就好像执行了表单的默认操作一样。

在 fiddle 中很难看到，但在我的网站中，人们被转发到 ./?username=，这告诉我这是初始屏幕中表单中不需要的行为。如何防止这种情况发生？

Answer 1

在对话框中添加一个id:

<form id="passwordform">
        <fieldset>
            <label for='username'>username or email</label><br />
            <input type='text' name='username' id='username' class='text ui-widget-content ui-corner-all' /><br />
        </fieldset>
    </form>

然后告诉 jQuery 阻止它提交，因为对话框会执行此操作:

$('#passwordform').submit( function(e) {
     e.preventDefault();
});