abstract：<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0">&
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>微博字数输入框</title>
<style type="text/css">
body{font-size: 12px;}
.box{width:600px;height: 160px;border: 10px solid pink;margin: 0px auto;padding:10px;}
img{float: left;}
.box1{float: left;margin-left: 250px;width: 150px;height:24px;text-align: right;font-size: 14px;color:#888;}
.box1 span{font-size: 16px;font-weight: bold;}
#text{width: 600px;height: 100px;border:1px solid #888;margin-top:5px;}
.box #T1,#T2,#T3,#T4,#T5,#T6{float: left;width:30px;height: 32px;line-height: 32px;padding-left: 26px;}
#T1{background: url(./pic/images/an5.png) no-repeat left center;}
#T2{background: url(./pic/images/an4.png) no-repeat left center;}
#T3{background: url(./pic/images/an3.png) no-repeat left center;}
#T4{background: url(./pic/images/an2.png) no-repeat left center;}
#T5{background: url(./pic/images/an1.png) no-repeat left center;width: 40px;}
#T6{margin-left:145px;margin-right: 15px;color:#888; width: 40px;}
#TT{width: 80px;height: 30px;border: none;color:#fff;float:left;border-radius: 5px;}
</style>
<script type="text/javascript">
var text,number,m
window.onload=function(){
text=document.getElementById('text')
number = document.getElementById('rest')
text.onkeyup=function aa(){
m=140-text.value.length;
number.innerHTML=m;
}
aa()
}
</script>
</head>
<body>
<div class="box">
<img src="./pic/images/12.png" alt="">
<div class="box1">还可以输入<span id="rest" ></span>字</div>
<textarea id="text" ></textarea>
<span id="T1">表情</span>
<span id="T2">图片</span>
<span id="T3">视频</span>
<span id="T4">话题</span>
<span id="T5">长微博</span>
<span id="T6">公开</span>
<input type="button" value="发布" id="TT" >
</div>
</body>
</html>
Correcting teacher：灭绝师太Correction time：2019-02-16 09:05:07
Teacher's summary：没有自己的思路,基本调试也没有,aa()这个函数可以去掉,调用aa()会报错