说一百句，不如我给大家贴张效果图，效果图请看下面：
<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta charset="utf-8" />
<title></title>
<style type="text/css">
* {
margin: 0;
padding: 0;
}
div.centent {
float: left;
text-align: center;
margin: 10px;
}
span {
display: block;
margin: 2px 2px
