扩展盒子的高度
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<head>
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<title>Document</title>
<style>
.father {
background-color: #ffff99;
border: 1px solid #111111;
}
.father div {
padding:10px;
margin: 15px;
border: 1px dashed #111111;
}
.father p {
border:1px dashed #111111;
background: #ff90ba;
}
div:nth-child(1){
float:left;
}
div:nth-child(2){
float:left;
}
div:nth-child(3){
float:right;
}
div p {
clear: both;
padding-top: 10px;
}
</style>
</head>
<body>
<div class="father">
<div class="box1">box1</div>
<div class="box2">box2</div>
<div class="box3">
box3<br/>
box3<br/>
box3<br/>
box3<br/>
</div>
<p>dddddddddddddddd ddddddddddddddddd
ddddddddsdd的点点滴滴的点点
滴滴啊打的等等的点点滴滴的点点滴滴的点点滴滴多大撒代发手打水电费费水岸东方士大夫大厦dddddddddddddddd ddddddddddddddddd
ddddddddsdd的点点滴滴的点点
滴滴啊打的等等的点点滴滴的点点滴滴的点点滴滴多大撒代发手打水电费费水岸东方士大夫大厦
</p>
</div>
</body>
</html>
