我正在使用jQuery验证进行UI选项卡，同时执行下一个和上一个按钮功能。一切正常，但验证不是。我该如何解决这个问题？
我在下面放了我的HTML和JavaScript代码。
HTML：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
</head>
<body>
<link rel="stylesheet" href="http://code.jquery.com/ui/1.8.3/themes/base/jquery-ui.css" />
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script type="text/javascript" src="http://code.jquery.com/ui/1.8.3/jquery-ui.js"></script>
<script src="jquery.steps.js"></script>
<script src="jquery.validate.js"></script>
<script src="jquery.ui.core.js"></script>
<script src="jquery.ui.widget.js"></script>
<script src="tabs.js"></script>
<script type="text/javascript" src="jsfile1.js"></script>
<link rel="stylesheet" href="jquery.steps.css" />
<div id="tabs">
<ul>
<li><a href="#account">1. Account</a></li>
<li><a href="#profile">2. Profile</a></li>
<li><a href="#warning">3. Warning</a></li>
<li><a href="#finish">4. Finish</a></li>
</ul>
<form id="example-advanced-form" action="#" enctype="multipart/form-data">
<div id="account">
<h3>Account</h3>
<fieldset>
<legend>Account Information</legend>
<label for="userName-2">User name *</label>
<input id="userName-2" name="userName" type="text" class="required">
<label for="password-2">Password *</label>
<input id="password-2" name="password" type="text" class="required">
<label for="confirm-2">Confirm Password *</label>
<input id="confirm-2" name="confirm" type="text" class="required">
<p>(*) Mandatory</p>
</fieldset>
</div>
<div id="profile">
<h3>Profile</h3>
<fieldset>
<legend>Profile Information</legend>
<label for="name-2">First name *</label>
<input id="name-2" name="name" type="text" class="required">
<label for="surname-2">Last name *</label>
<input id="surname-2" name="surname" type="text" class="required">
<label for="email-2">Email *</label>
<input id="email-2" name="email" type="text" class="required email">
<label for="address-2">Address</label>
<input id="address-2" name="address" type="text">
<label for="age-2">Age (The warning step will show up if age is less than 18) *</label>
<input id="age-2" name="age" type="text" class="required number">
<p>(*) Mandatory</p>
</fieldset>
</div>
<div id="warning">
<h3>Warning</h3>
<fieldset>
<legend>You are to young</legend>
<p>Please go away ;-)</p>
</fieldset>
</div>
<div id="finish">
<h3>Finish</h3>
<fieldset>
<legend>Terms and Conditions</legend>
<input id="acceptTerms-2" name="acceptTerms" type="checkbox" class="required"> <label for="acceptTerms-2">I agree with the Terms and Conditions.</label>
</fieldset>
</div>
</form>
</div>
<input type="button" id="btnPrevious" value="Previous" style = "display:none"/>
<input type="button" id="btnNext" value="Next" />
</body>
</html>
JavaScript的：
$(document).ready(function() {
alert("1")
var form = $("#example-advanced-form").show();
form.steps({
headerTag: "h3",
bodyTag: "fieldset",
transitionEffect: "slideLeft",
onStepChanging: function (event, currentIndex, newIndex)
{
alert("2")
// Always allow previous action even if the current form is not valid!
if (currentIndex > newIndex)
{
return true;
}
// Forbid next action on "Warning" step if the user is to young
if (newIndex === 3 && Number($("#age-2").val()) < 18)
{
return false;
}
// Needed in some cases if the user went back (clean up)
if (currentIndex < newIndex)
{
// To remove error styles
form.find(".body:eq(" + newIndex + ") label.error").remove();
form.find(".body:eq(" + newIndex + ") .error").removeClass("error");
}
form.validate().settings.ignore = ":disabled,:hidden";
return form.valid();
},
onStepChanged: function (event, currentIndex, priorIndex)
{
// Used to skip the "Warning" step if the user is old enough.
if (currentIndex === 2 && Number($("#age-2").val()) >= 18)
{
form.steps("Next");
}
// Used to skip the "Warning" step if the user is old enough and wants to the previous step.
if (currentIndex === 2 && priorIndex === 3)
{
form.steps("Previous");
}
},
onFinishing: function (event, currentIndex)
{
form.validate().settings.ignore = ":disabled";
return form.valid();
},
onFinished: function (event, currentIndex)
{
alert("Submitted!");
}
}).validate({
errorPlacement: function errorPlacement(error, element) { element.before(error); },
rules: {
confirm: {
equalTo: "#password-2"
}
}
});
var currentTab = 0;
$(function () {
$("#tabs").tabs({
select: function (e, i) {
currentTab = i.index;
}
});
});
$("#btnNext").live("click", function () {
var tabs = $('#tabs').tabs();
var c = $('#tabs').tabs("length");
currentTab = currentTab == (c - 1) ? currentTab : (currentTab + 1);
tabs.tabs('select', currentTab);
$("#btnPrevious").show();
if (currentTab == (c - 1)) {
$("#btnNext").hide();
} else {
$("#btnNext").show();
}
});
$("#btnPrevious").live("click", function () {
var tabs = $('#tabs').tabs();
var c = $('#tabs').tabs("length");
currentTab = currentTab == 0 ? currentTab : (currentTab - 1);
tabs.tabs('select', currentTab);
if (currentTab == 0) {
$("#btnNext").show();
$("#btnPrevious").hide();
}
if (currentTab < (c - 1)) {
$("#btnNext").show();
}
});
});