abstract：微博输入数字小功能 <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=dev
微博输入数字小功能
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>微博输入</title>
<style>
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: 5px;
}
</style>
<script>
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('您还没有输入');
text.focus();
}else if(m<0){
alert('字数太多,不可以发布');
text.value = '';
text.focus();
}else{
alert('发布成功');
text.value = '';
text.focus();
}
}
aa();
}
}
</script>
</head>
<body>
<div class="box">
<img src="images/12.png" alt="">
<div class="box1">还可以输入 <span id="number"></span>字</div>
<textarea style="resize:none" 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：2019-03-20 09:31:20
Teacher's summary：功能完成的不错,就是基础练习,好好掌握哦!