jQuery UI模态弹出窗口-按钮点击

我试图有我的注册按钮在一个形式导致模态窗口，这将显示用户的信息的输入。到目前为止，我有三个问题。

1. 关闭模态窗口后，我的表单缺失
2. 我想把模态窗口的"关闭"按钮重命名为"确认"，如果可能的话
3. 关闭(确认)模态窗口后，我想回到网页和表单是空的(没有以前的输入)

我的代码:

HTML - Form:

<div id="myForm">
    <form name="myForm" method="POST">
        <fieldset>
            <legend>Register your interest</legend>
            <div id="divpopup">
            <p><label class="title" for="name">Your name:</label>
                <input type="text" name="name" id="name"><br />
                <label class="title" for="email">Your email:</label>
                <input type="text" name="email" id="email"></p>
                <label class="title" for="persons">Persons:</label>
                <input id="personsId" type="text" name="persons" id="persons"></p>
            <p><label for="location" class="title">Your closest center:</label>
                <select class="target" name="location" id="location">
                     <option value="ny">New York</option>
                     <option value="il">Chicago</option>
                     <option value="ca">San Francisco</option>
                </select></p>
            <span class="title">Are you a member?</span>
            <label><input type="radio" name="member" value="yes" /> Yes</label>
            <label><input type="radio" name="member" value="no" /> No</label></p>
            </div>
        </fieldset>
    <div class="submit" id="myButton"><input type="button" id="btnclick" value="Register" /></div>
    </form>
    <div class="quantity"></div>
    </div>

SCRIPT - Modal Window:

<script type="text/javascript"> //register modal window
    $(function() {
        $("#btnclick").click(function() {
            $("#divpopup").dialog({
                title: "Your Input",
                width: 500,
                height: 500,
                modal: true,
                buttons: {
                    Close:
                    function() {
                        $(this).dialog('close');
                    }
                }
            });
        });
    })
</script>