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<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title> 页面名称 </title>
<style type="text/css">
.main {
width: 300px;
height: 300px;
background: #009900;
}
.main-box {
width: 300px;
height: 300px;
position: relative;
}
.main-a {
background: #CC6600;
position: absolute;
}
</style>
<script type="text/javascript" src="http://libs.baidu.com/jquery/1.9.1/jquery.min.js"></script>
</head>
<body>
<div class="main">
<div class="main-box">
<div class="main-a">
<div class="child">联系电话:12356</div>
<div class="child-a">我是文字介绍</div>
</div>
</div>
</div>
<script type="text/javascript">
$(function(){
$(".main-a").css("top",($(".main-box").height()-$(".main-a").outerHeight())/2);
});
</script>
</body>
</html>