摘要：<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>微博输入</title> <style type="tex
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>微博输入</title>
<style type="text/css">
body{font-size:12px;}
.box{width:600px; heigth: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;}
#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: 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//微博限制字数是140
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("字数过多，不可以发布")
text.focus();
}else{
alert("发布成功")
}
}
}
</script>
</head>
<body>
<div class="box">
<img src="images/12.png">
<div class="box1">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>
用js控制页面元素更简单方便一些。
