abstract：<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>微博輸入</title> <style type="text/css"> body{font-size:12px;} .box
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>微博輸入</title>
<style type="text/css">
body{font-size:12px;}
.box{width:600px;height:160px;border:10px solid pink;border-radius:5px;margin:0px auto;padding:10px;}
img{float:left;}
.box1{float:left;margin-left:255px;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 #sp1,#sp2,#sp3,#sp4,#sp5,#sp6{float:left;width:30px;height:32px;line-height:32px;padding-left:26px;}
#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:150px;margin-right:15px;color:#888;}
#bt{float:left;width:80px;height:30px;border:none;background:#ffc09f;color:#fff;border-radius:5px;}
</style>
<script type="text/javascript">
var text,number,bt,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('您還沒有輸入！');
text.focus();
}else if(m<0){
alert('微博輸入過多，不可以發(fā)布');
text.focus();
}else{
alert('發(fā)布成功?。?！');
}
}
aa();
}
</script>
</head>
<body>
<div>
<img src="images/12.png" alt="">
<div>還可以輸入<span id="number"></span>字</div>
<textarea name="" id="text" cols="30" rows="10"></textarea>
<span id="sp1">表情</span>
<span id="sp2">圖片</span>
<span id="sp3">視頻</span>
<span id="sp4">話題</span>
<span id="sp5">長微博</span>
<span id="sp6">公開</span>
<input type="button" value="發(fā)布" id="bt">
</div>
<script type="text/javascript"></script>
</body>
</html>
Correcting teacher：天蓬老師Correction time：2019-07-30 09:29:36
Teacher's summary：你的js代碼呢? 只看到了 <script> 標簽