abstract：<!DOCTYPE html><html><head><meta charset="UTF-8"><title>我的微博</title><style type="text/css"> body{font-size: 12px;}.mydi
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>我的微博</title>
<style type="text/css">
body{font-size: 12px;}
.mydiv{width:600px;height:200px; border:12px solid pink; margin:0px auto; padding:10px;}
img{float: left;}
.mydiv1{float:left; margin-left: 255px; width:155px; height: 24px; text-olign:right; font-size: 14px;color:#888;}
.mydiv span{font-size: 16px; font-weight: bold;}
#text{width:600px;height:130px;border:1px solid green; margin-top:5px;}
.mydiv #sp1,#sp2,#sp3,#sp4,#sp5,#sp6{float:left; width:30px;height: 32px;line-height: 32px;padding-left: 26px; font-size:12px;}
#sp1{background: url(image/an5.png) no-repeat left center;}
#sp2{background:url(image/an4.png) no-repeat left center;}
#sp3{background:url(image/an3.png) no-repeat left center;}
#sp4{background:url(image/an2.png) no-repeat left center;}
#sp5{background:url(image/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; border-radius: 5px;}
</style>
<script type="text/javascript">
var text,number,m=140
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("你还没有输入任何字符")
text.focus()
}else if (m<0) {
alert("老大你输入的字符太多了，无法发布哦！看看如何节省几个字符")
text.focus()
}else{
alert("老大你真不错哦！发布成功了")
}
}
aa()
}
</script>
</head>
<body>
<div>
<img src="image/12.png" alt="">
<div>还可以输入 <span id="number"></span>字</div>
<textarea id="text"></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">长微博</span>
<span id="sp6">公开</span>
<input type="button" value="发布" id="bt">
</div>
</body>
</html>
Correcting teacher：灭绝师太Correction time：2019-02-11 10:29:30
Teacher's summary：哎呦不错哟!老师的案例带有测试性,没有太完善,自己加油