abstract：<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>为什么“表情”“图片”前面插入的图片使用的是“background-image”，而不是用img</tit
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>为什么“表情”“图片”前面插入的图片使用的是“background-image”，而不是用img</title>
<style>
body{font-size:12px;}
.box{
width:600px;
height:160px;
border:10px solid pink;
margin:20px auto;
padding:10px;
}
.box1{
float:right;
margin-right:4px;
font-size:14px;
color: #888;
}
#number{
font-size:16px;
font-weight:bold;
}
#text{
width:600px;
height:100px;
display:block;
}
#sp1,#sp2,#sp3,#sp4,#sp5,#sp6{
width:30px;
height:32px;
line-height:32px;
padding-left:22px;
margin-right:8px;
}
#sp1{background:url(static/images/an5.png) no-repeat left 45%;background-size:46%;}
#sp2{background:url(static/images/an4.png) no-repeat left 45%;background-size:46%;}
#sp3{background:url(static/images/an3.png) no-repeat left 45%;background-size:46%;}
#sp4{background:url(static/images/an2.png) no-repeat left 45%;background-size:46%;}
#sp5{background:url(static/images/an1.png) no-repeat left 45%;background-size:46%;}
#sp6{margin-left:160px;color:#888;}
#bt{width:80px;height:30px;border:none;outline:none;color:#fff;background:orange;position:relative;right:-9px;top:2px;}
</style>
</head>
<body>
<div class="box">
<img src="static/images/12.png">
<div class="box1">还可以输入<span id="number">140</span>字</div>
<textarea id="text"></textarea>
<span id="sp1">表情</span>
<span id="sp2">图片</span>
<span id="sp3">视频</span>
<span id="sp4">话题</span>
<span id="sp5">长微博</span>
<span id="sp6">公开</span>
<input type="button" value="发布" id="bt">
</div>
</body>
</html>