abstrait：<!doctype html> <html> <head> <meta charset="utf-8"> <style> body{font-size:12px;} .box{width:600px; height:160px; border:10px solid&nb
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<style>
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:325px; 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:35px; line-height:35px; padding-left:26px;}
#sp1{ background:url(an5.png) no-repeat left center;}
#sp2{ background:url(an4.png) no-repeat left center;}
#sp3{ background:url(an3.png) no-repeat left center;}
#sp4{ background:url(an2.png) no-repeat left center;}
#sp5{ background:url(an1.png) no-repeat left center; width:40px;}
#sp6{ margin-left:250px; margin-right:15px; color:#888;}
#bt{float:right; width:80px; height:30px; border:none; background:#ffc09f; color:#FFF; border-radius:5px;}
</style>
<title>微博輸入字數(shù)限制功能</title>
<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("你還沒有輸入！");
text.focus();
}else if(m<0){
alert("字數(shù)太多，不可以發(fā)布！");
text.focus();
}else{
alert("發(fā)布成功！");
}
}
aa()
}
</script>
</head>
<body>
<div class="box">
<img src="https://p1.pstatp.com/list/190x124/pgc-image/bb6cc499cfe24bfd92039e4bc740bc10" height="20">
<div class="box1">還可以輸入<span id="number"></span>字</div>
<textarea id="text"></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">長微表</span>
<span id="sp6">公開</span>
<input type="button" value="發(fā)布" id="bt">
</div>
</body>
</html>
Professeur correcteur：天蓬老師Temps de correction：2019-05-10 15:49:32
Résumé du professeur：看上去不太像自己寫的, 是不是把教學代碼直接復制上來了