添加于删除样式名

node2:/var/www/html/js#cat h33.html
<style type="text/css">
.aaaa{
  color:green;
}

.bbbb {
  color:red;
}

.cccc{
 color:yellow;
}

.dddd{
 height:100px;
 font-size:100px;
}

.ffff{
font-family:'STFangsong';
}
</style>
<h1 class="aaaa dddd ffff">泰隆银行</h1>
<h1 class="bbbb">杭州银行</h1>
<h1 class="cccc">稠州银行</h1>
<script type="text/javascript" src="jquery-2.2.2.min.js"></script> 
<script type="text/javascript" src="h33.js"></script>  
node2:/var/www/html/js#
node2:/var/www/html/js#cat h33.js
$('.bbbb').addClass('height:100px');