<html>
<head>
<style>
.siblings *
{
display: block;
border: 2px solid lightgrey;
color: lightgrey;
padding: 5px;
margin: 15px;
}
</style>
<script src="https://libs.baidu.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("h2").prevAll(".1,.2,.3").css({"color":"red","border":"2px solid red"});
});
</script>
</head>
<body>
<div style="width:500px;" class="siblings">
<h3 class="3">h3 class "3"</h3>
<span>span</span>
<span class="2">span class "2"</span>
<span class="2">span also class "2"</span>
<p>p</p>
<p class="1">p class "1"</p>
<p>p</p>
<h3>h3</h3>
<h2>h2</h2>
<span>span</span>
<p>p</p>
</div>
<p>In this example, we return all elements with class names "1", "2" and "3", that are previous siblings of the li element with class name "start".</p>
</body>
</html>