abstrak：<!DOCTYPE html><html><head> <title>微博輸入</title> <meta charset="utf-8"> <style type="text/css"> body{font-si
<!DOCTYPE html>
<html>
<head>
<title>微博輸入</title>
<meta charset="utf-8">
<style type="text/css">
body{font-size:12px;}
.box{width: 600px;height: 160px;border:10px solid pink;margin: 0 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 #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: 150px;margin-right: 15px;color:#888;}
#bt{float: left;width: 80px;height: 30px;border:none;background: #ffc09f;color: #fff;border-radius: 6px;}
</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('您還沒有輸入')
text.focus()
}else if(m<0){
alert('字數(shù)過多，不能發(fā)布')
text.focus()
}else{
alert('發(fā)布成功')
}
}
aa()
}
</script>
</head>
<body>
<div class="box">
<img src="images/12.png">
<div class="box1">還可以輸入<span id="number"></span>字</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">長微博</span>
<span id="sp6">公開</span>
<input type="button" value="發(fā)布" id="bt">
</div>
</body>
</html>
Guru membetulkan：西門大官人Masa pembetulan：2019-04-04 17:40:03
Rumusan guru：注意一下你的函數(shù)的命名，盡量避免出現(xiàn)aa,bb這樣無意義的函數(shù)名稱。