微博输入数字
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title> </title>
<style type="text/css">
body{font-size:12px;}
.box{
width: 600px;height: 160px;
border: 10px solid pink;margin: 0px 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 #ccc;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:158px;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;
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");
text.focus();
}else if(m<0){
alert('字数太多,不可以发布')
text.focus();
}else{
alert("发布成功");
}
}
aa();
}
</script>
</head>
<body>
<div>
<img src="images/12.png">
<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>