在以下示例中，我想为活动缩略图提供背景颜色和边框 - 引导轮播。内容项有一个活动类，但滑块拇指中没有相同的类。如何为活动缩略图添加类或样式，请帮助！
<!-- Main Area -->
<div id="main_area">
<!-- Slider -->
<div class="row">
<div class="span12" id="slider">
<!-- Top part of the slider -->
<div class="row">
<div class="span8" id="carousel-bounding-box">
<div id="myCarousel" class="carousel slide">
<!-- Carousel items -->
<div class="carousel-inner">
<div class="active item" data-slide-number="0"><img src="http://placehold.it/770x300&text=one" /></div>
<div class="item" data-slide-number="1"><img src="http://placehold.it/770x300&text=two" /></div>
<div class="item" data-slide-number="2"><img src="http://placehold.it/770x300&text=three" /></div>
<div class="item" data-slide-number="3"><img src="http://placehold.it/770x300&text=four" /></div>
<div class="item" data-slide-number="4"><img src="http://placehold.it/770x300&text=five" /></div>
<div class="item" data-slide-number="5"><img src="http://placehold.it/770x300&text=six" /></div>
</div>
<!-- Carousel nav -->
<a class="carousel-control left" href="#myCarousel" data-slide="prev">‹</a>
<a class="carousel-control right" href="#myCarousel" data-slide="next">›</a>
</div>
</div>
<div class="span4" id="carousel-text"></div>
<div style="display: none;" id="slide-content">
<div id="slide-content-0">
<h2>Slider One</h2>
<p>Lorem Ipsum Dolor</p>
<p class="sub-text">October 24 2012 - <a href="#">Read more</a></p>
</div>
<div id="slide-content-1">
<h2>Slider Two</h2>
<p>Lorem Ipsum Dolor</p>
<p class="sub-text">October 24 2012 - <a href="#">Read more</a></p>
</div>
<div id="slide-content-2">
<h2>Slider Three</h2>
<p>Lorem Ipsum Dolor</p>
<p class="sub-text">October 24 2012 - <a href="#">Read more</a></p>
</div>
<div id="slide-content-3">
<h2>Slider Four</h2>
<p>Lorem Ipsum Dolor</p>
<p class="sub-text">October 24 2012 - <a href="#">Read more</a></p>
</div>
<div id="slide-content-4">
<h2>Slider Five</h2>
<p>Lorem Ipsum Dolor</p>
<p class="sub-text">October 24 2012 - <a href="#">Read more</a></p>
</div>
<div id="slide-content-5">
<h2>Slider Six</h2>
<p>Lorem Ipsum Dolor</p>
<p class="sub-text">October 24 2012 - <a href="#">Read more</a></p>
</div>
</div>
</div>
</div>
</div> <!--/Slider-->
<div class="row hidden-phone" id="slider-thumbs">
<div class="span12">
<!-- Bottom switcher of slider -->
<ul class="thumbnails">
<li class="span2">
<a class="thumbnail" id="carousel-selector-0">
<img src="http://placehold.it/170x100&text=one" />
</a>
</li>
<li class="span2">
<a class="thumbnail" id="carousel-selector-1">
<img src="http://placehold.it/170x100&text=two" />
</a>
</li>
<li class="span2">
<a class="thumbnail" id="carousel-selector-2">
<img src="http://placehold.it/170x100&text=three" />
</a>
</li>
<li class="span2">
<a class="thumbnail" id="carousel-selector-3">
<img src="http://placehold.it/170x100&text=four" />
</a>
</li>
<li class="span2">
<a class="thumbnail" id="carousel-selector-4">
<img src="http://placehold.it/170x100&text=five" />
</a>
</li>
<li class="span2">
<a class="thumbnail" id="carousel-selector-5">
<img src="http://placehold.it/170x100&text=six" />
</a>
</li>
</ul>
</div>
</div>
<script>
jQuery(document).ready(function($) {
$('#myCarousel').carousel({
interval: 5000
});
$('#carousel-text').html($('#slide-content-0').html());
//Handles the carousel thumbnails
$('[id^=carousel-selector-]').click( function(){
var id_selector = $(this).attr("id");
var id = id_selector.substr(id_selector.length -1);
var id = parseInt(id);
$('#myCarousel').carousel(id);
});
// When the carousel slides, auto update the text
$('#myCarousel').on('slid', function (e) {
var id = $('.item.active').data('slide-number');
$('#carousel-text').html($('#slide-content-'+id).html());
});
});
</script>