摘要：<!DOCTYPE html> <html> <head> <title>微博输入字符</title> <meta charset="utf-8"> &nbs
<!DOCTYPE html>
<html>
<head>
<title>微博输入字符</title>
<meta charset="utf-8">
<style type="text/css">
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: 350px;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: 160px;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,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; //微博的限制字数是140
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，请输入要发布的内容！");
text.focus()
}
else if (m<0) {
alert("你的字数大于140字，不能发布");
text.focus
}
else{
alert("发布成功！")
}
}
aa();
}
</script>
</head>
<body>
<div class="box">
<img src="img/01.phg">
<div class="box1">
还可以输入 <span id="number"></span>
<span>字</span>
</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>
批改老师：韦小宝批改时间：2018-12-18 11:58:15
老师总结：写的很棒！代码写的很规范！也很清晰！不错不错！
