<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>微博输入数字</title>
<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;
}
.box 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;
font-size: 12px;
}
#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;
}
</style>
<script type="text/javascript">
var number,text,bt,m;
window.onload =function(){
number = document.getElementById('number');
text = document.getElementById('text');
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("没有输入内容");
}else if(m<0){
alert("你输入的内容过多，无法发布");
}else{
alert("发布成功");
}
}
aa();
}
</script>
</head>
<body>
<div>
<img src="images/12.png" alt="">
<div>还可以输入 <span id="number">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>
