abstract：<!doctype html><html><head><meta charset="utf-8"><style type="text/css">.box{width:600px; height:170px; border:8px solid #FD4E4E; margin:0px auto;padd
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<style type="text/css">
.box{width:600px; height:170px; border:8px solid #FD4E4E; margin:0px auto;padding:6px;}
.box1 { float:right;color:#666}
img{float:left;}
input{border:0px; background-color:#FA7E3D;width:60px; height:22px;border-radius:2px;}
#text{width:595px; height:100px;margin: 5px 0px;}
</style>
<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("你输入过多字，不可以发布")
text.focus()
}else{
alert("发布成功")
}
}
aa()
}
</script>
</head>
<body>
<div class="box">
<img src="01.png">
<div class="box1"> 你可以输入<span id="number"> </span>字 </div>
<textarea id="text"></textarea>
<img src="02.png">
<input type="button" value="发布" id="bt">
</div>
</div>
</body>
</html>
Correcting teacher：西门大官人Correction time：2019-04-02 11:16:46
Teacher's summary：作业完成的不错，最好上传一下程序的运行效果图。