我是相当新的jQuery的，所以这可能是一个简单的问题，而是有没有办法隐藏提交表单上的按钮，直到所有的领域都得到了验证。

I'm fairly new to Jquery, so this might be a simple problem, but is there a way to hide the submit button on a form until all the fields have been validated.

验证将需要一个在您输入的解决方案。基本上我有3场 - 姓，名和​​电子邮件。我想提交按钮留下隐患，直到两个名称字段已被填充和一个有效的E-mail地址已进入电子邮件领域。

The validation would need to be an 'as you type' solution. Basically I have 3 fields - first name, last name and e-mail. I'd like the submit button to stay hidden until the two 'name' fields have been filled in and a valid e-mail address has been entered into the e-mail field.

窗体本身使用AJAX来输入表单数据到数据库中。该表格​​是应该自动关闭，一旦点击该按钮提交一个收藏夹。

The form itself uses AJAX to input the form data into a database. The form is in a lightbox which should automatically close once the submit button is clicked.

您可以看到一个例子在这里： http://testing.xenongroupadmin.com/whatis/pfi

You can see an example here: http://testing.xenongroupadmin.com/whatis/pfi

忽略了关闭此窗口链接 - 这还只是存在于我的便利，将在最终版本中被删除

Ignore the 'Close this Window' link - that's just there for my convenience and will be removed in the final version.

下面是HTML code的形式，随后的JQuery / AJAX提交code：

Below is the HTML code for the form, followed by the JQuery/AJAX submission code:

<form id="registerform" action="thanks.php" method="POST">
 <ul id="inputform">
  <li>
   <label for="firstname" id="firstnamelabel">First Name</label>
   <input type="text" name="first_name" id="fname" class="registerboxes" />
  </li>
  <li>
   <label for="lastname" id="lastnamelabel">Last Name</label>
   <input type="text" name="last_name" id="lname" class="registerboxes" />
  </li>
  <li>
   <label for="email" id="emaillabel">E-mail Address</label>
   <input type="text" name="emailbox" id="email" class="registerboxes" />
  </li>
 </ul>
 <input type="submit" value="Submit" id="emailbutton" />
</form>

和Jquery的：

$(document).ready(function(){
 $("form#registerform").submit(function() {
  var fname     = $('#fname').attr('value');
  var lname     = $('#lname').attr('value');
  var email     = $('#email').attr('value');    

 $.ajax({
  type: "POST",
  url: "post.php",
  data: "fname="+ fname +"& lname="+ lname +"& email="+ email,
  success: function(){

 $('div#register-panel, div#lightbox').fadeOut(300);
   }
  });
  return false;
 });
});

谢谢！

推荐答案

http://jsfiddle.net/nickaknudson / KnZaq /

$(document).ready(function() {
    $('#emailbutton').hide();
    $('input').change(function(e) {
        if ($('#fname').val() && $('#lname').val() && $('#email').val() && validateEmail($('#email').val())) {
            $('#emailbutton').show();
        }
    });
});

var validateEmail = function(email) {
    var re = /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
    return re.test(email);
};​

更新

对不起，它可能已被马车上的那个版本的小提琴。再试一次？ http://jsfiddle.net/nickaknudson/KnZaq/3/

Sorry, it may have been buggy on that version of the fiddle. Try again? http://jsfiddle.net/nickaknudson/KnZaq/3/

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