abstract：<!DOCTYPE html><html><head> <meta charset="utf-8"> <title>weibo1</title> <style type="text/css"> body{font-size:12px;} .box{width:600px;he
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>weibo1</title>
<style type="text/css">
body{font-size:12px;}
.box{width:600px;height:160px;border:10px solid pink;margin:0 auto;padding:10px;}
.box img{float:left;}
.box div{float:left;width:150px;height:24px;margin-left: 255px;text-align:center;line-height:24px;font-size:14px;color:#888}
.box span{font-size:16px;font-weight: bold}
#text{width:600px;height:100px;border:1px solid #ccc;margin-top:5px;}
#tu1,#tu2,#tu3,#tu4,#tu5,#tu6{float:left;width:30px;height:32px;font-size:14px;color:#888;padding-left:25px;line-height:32px;}
#tu1{background:url(images/an5.png) no-repeat left center;}
#tu2{background:url(images/an4.png) no-repeat left center;}
#tu3{background:url(images/an3.png) no-repeat left center;}
#tu4{background:url(images/an2.png) no-repeat left center;}
#tu5{background:url(images/an1.png) no-repeat left center;width:45px;}
#tu6{margin-left:150px;margin-right:15px;color:#888}
#bt{border:none;border-radius:5px;width:75px;height:30px;float:left;background:#ffc09f;color:#fff;}
</style>
<script type="text/javascript">
var txt,num,number,fen
window.onload=function(){
txt=document.getElementById('text')
number=document.getElementById('zishu')
txt.onkeyup=function ce(){
num=txt.value
fen=140-num.length
if(fen<0){
zishu.style.color="red"
}else{
zishu.style.color="blue"
}
zishu.innerHTML=fen
}
bt.onclick=function(){
if(fen==140){
alert("不能发布空内容")
text.focus()
}else if(fen<0){
alert("发布文字超过最大限制")
text.focus()
}else{
alert("发布成功")
}
}
ce()
}
</script>
</head>
<body>
<div class="box">
<img src="images/12.png">
<div>你还可以输入<span id="zishu"></span>字</div>
<textarea id="text"></textarea>
<span id="tu1">图片</span>
<span id="tu2">文字</span>
<span id="tu3">音乐</span>
<span id="tu4">视频</span>
<span id="tu5">长微博</span>
<span id="tu6">公开</span>
<input type="button" value="发布" id="bt">
</div>
</body>
</html>
我直接把获取到的值给了fen这个变量，用它去比较，对于这一款慢慢熟悉了，就是很不是特别熟练，比如这个正则和判断表单有点陌生,对于隐性参数感觉有点突然
Correcting teacher：灭绝师太Correction time：2019-03-02 09:05:54
Teacher's summary：完成的不错!相同效果可以通过不同方法完成,作业可以跳出老师思维!