当您点击提交按钮时，浏览器不知道你想发送你的表格。

When you're clicking on a 'Submit' button, the browser doesn't know that you want to send your form.

只需使用type =button并更改你的javascript：

Just use type="button" and change your javascript:

<script>
$(document).ready(function() {
    $("#fancybox-manual-b").click(function() {
        $.post('go.php', $(this).parent().serialize())
            .done(function() {
                $.fancybox.open({
                    href : 'go.php',
                    type : 'iframe',
                    padding : 5
                });
            });
    });
});
</script>