对齐3 divs在中心下4 divs
问题描述：
我有4个div标签每一个都是一天前。 星期一，星期二，星期三，星期四等。。我有4个对齐的浮动，每个200px宽。现在我有3个div标签，每个标签也是一天星期五星期六星期日，我想把它放在上面的4下面。对齐3 divs在中心下4 divs
<div id= "top-four-days">
<br />
<div class= "monday">
<h2>Monday</h2>
<br />
<h3>Date:</h3>
<h3>Time:</h3>
<h3>Location:</h3>
<h2>Evening</h2>
<br />
<h3>Date:</h3>
<h3>Time:</h3>
<h3>Location:</h3>
</div>
<div class= "tuesday">
<h2>Tuesday</h2>
<br />
<h3>Date:</h3>
<h3>Time:</h3>
<h3>Location:</h3>
<h2>Evening</h2>
<br />
<h3>Date:</h3>
<h3>Time:</h3>
<h3>Location:</h3>
</div>
<div class= "wednesday">
<h2>Wednesday</h2>
<br />
<h3>Date:</h3>
<h3>Time:</h3>
<h3>Location:</h3>
<h2>Evening</h2>
<br />
<h3>Date:</h3>
<h3>Time:</h3>
<h3>Location:</h3>
</div>
<div class= "thursday">
<h2>Thursday</h2>
<br />
<h3>Date:</h3>
<h3>Time:</h3>
<h3>Location:</h3>
<h2>Evening</h2>
<br />
<h3>Date:</h3>
<h3>Time:</h3>
<h3>Location:</h3>
</div>
</div>
<div id= "bottome-three-days">
<br />
<div class= "friday">
<h2>Friday</h2>
<br />
<h3>Date:</h3>
<h3>Time:</h3>
<h3>Location:</h3>
<h2>Evening</h2>
<br />
<h3>Date:</h3>
<h3>Time:</h3>
<h3>Location:</h3>
</div>
<div class= "saturday">
<h2>Saturday</h2>
<br />
<h3>Date:</h3>
<h3>Time:</h3>
<h3>Location:</h3>
<h2>Evening</h2>
<br />
<h3>Date:</h3>
<h3>Time:</h3>
<h3>Location:</h3>
</div>
<div class= "sunday">
<h2>Sunday</h2>
<br />
<h3>Date:</h3>
<h3>Time:</h3>
<h3>Location:</h3>
<h2>Evening</h2>
<br />
<h3>Date:</h3>
<h3>Time:</h3>
<h3>Location:</h3>
</div>
</div>
风格
#top-four-days {
width: 800px;
}
#bottom-three-days {
width: 800px;
background-color: #999;
}
.monday {
width: 200px;
height: 300px;
background-color: purple;
float: left;
}
.tuesday {
width: 200px;
height: 300px;
background-color: #F00;
float: left;
}
.wednesday {
width: 200px;
height: 300px;
background-color: blue;
float: left;
}
.thursday {
width: 200px;
height: 300px;
background-color: yellow;
float: left;
}
.friday {
width: 200px;
height: 300px;
background-color: yellow;
float: left;
}
.saturday {
width: 200px;
height: 300px;
background-color: yellow;
float: left;
}
.sunday {
width: 200px;
height: 300px;
background-color: yellow;
float: left;
}