abstract：<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, in
<!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>微博输入案例</title>
<style>
*{
margin: 0;
padding: 0;
}
.box{
width: 610px;height: 180px;border:10px solid pink;margin: 0 auto;padding:10px;
}
.box1{
float: right;
font-size: 14px;
color: #888888;
}
#text{
width: 606px;
height: 106px;
border: 1px solid #ccc;
margin:5px 0;
}
input{
width: 80px;
height: 30px;
background: #FFC09F;
border-radius: 5px;
color:white;
}
.box #sp1,#sp2,#sp3,#sp4,#sp5,#sp6{
float: left;width: 32px;height: 32px;padding-left: 26px;line-height: 32px;
}
#sp1{background: url(images/an5.png) no-repeat left center;}
#sp2{background: url(images/an4.png) no-repeat left center;}
#sp3{background: url(images/an3.png) no-repeat left center;}
#sp4{background: url(images/an2.png) no-repeat left center;}
#sp5{background: url(images/an1.png) no-repeat left center;width: 40px;}
#sp6{ margin-left: 128px;margin-right:15px;color: #888;border:none;s }
</style>
</head>
<body>
<script type="text/javascript">
var text,number,m
window.onload=function (){
text=document.getElementById('text')
number=document.getElementById('number')
bt=document.getElementById('bt')
text.onkeyup=function aa(){
m=140-text.value.length
if(m<0){
number.style.color="red"
}else{
number.style.color="#888"
}
number.innerHTML=m;
}
bt.onclick=function(){
if (m==140) {
alert("你还没有输入")
text.focus()
}else if(m<0){
alert("字数太多，不可以发布")
text.focus()
}else{
alert("发布成功")
}
}
}
</script>
<div class="box">
<img src="images/12.png" alt="">
<div class="box1">还可以输入<span id='number'></span>字</div>
<textarea name="" id="text" cols="30" rows="10" ></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" style="width: 66px;">长微博</span>
<span id="sp6">公开</span>
<input type="button" value="发布" id="bt">
</div>
</body>
</html>
Correcting teacher：天蓬老师Correction time：2019-08-27 09:18:12
Teacher's summary：其实,weibo早已取消了字数限制, 但这仍是一个不错的小练习