abstract：<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>微博輸入</title> <script type="text/javascript"> var
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>微博輸入</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?jǐn)?shù)太多。")
text.focus()
}else{
alert("發(fā)布成功")
}
}
aa()
}
</script>
</head>
<style>
body{font-size: 12px}
.box{
width: 600px;
height: 160px;
border: 8px solid pink;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 #ccc;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/weibo/an5.png) no-repeat left center;}
#sp2{background: url(images/weibo/an4.png) no-repeat left center;}
#sp3{background: url(images/weibo/an3.png) no-repeat left center;}
#sp4{background: url(images/weibo/an2.png) no-repeat left center;}
#sp5{background: url(images/weibo/an1.png) no-repeat left center;width: 40px;}
#sp6{margin-left: 150px;margin-right: 15px;#888;}
#bt{float: left;width: 80px;height: 30px;border: none;background: #ffc09f;color: #fff; border-radius: 5px;}
</style>
<body>
<div class="box">
<img src="images/weibo/12.png">
<div class="box1">還可以輸入<span id="number">字</span></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(zhǎng)微博</span>
<span id="sp6">公開</span>
<input type="button" value="發(fā)布" id="bt">
</div>
</body>
</html>
Correcting teacher：西門大官人Correction time：2019-03-30 10:33:33
Teacher's summary：主要有兩個(gè)問(wèn)題：
1、函數(shù)命名不規(guī)范，不要使用aa等無(wú)意思的名字
2、js語(yǔ)句沒有加分號(hào)。如果生產(chǎn)環(huán)境對(duì)代碼做了壓縮處理，js就無(wú)法運(yùn)行了