摘要：<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>微博输入数字</title>
<style type="text/css">
.box{
width:640px;
border:8px solid pink;
border-radius: 20px;
margin: 20px auto;
padding: 10px 8px;
}
.box img{
float:left;
}
.box div{
width:150px;
text-align: right;
float: left;
margin-left:280px;
color:#999;
}
.box textarea{
margin:10px 5px;
/* 设置文本域不可拖动 */
resize: none;
border-radius: 3px;
}
.box > span {
float:left;
width:50px;
padding-left:30px;
}
#span1{background: url(../image/an5.png) no-repeat left center;}
#span2{background: url(../image/an4.png) no-repeat left center;}
#span3{background: url(../image/an3.png) no-repeat left center;}
#span4{background: url(../image/an2.png) no-repeat left center;}
#span5{background: url(../image/an1.png) no-repeat left center;}
#span6{padding-left:90px;}
.box input{
width:80px;height:30px;
background: pink;
border-radius: 5px;
color: #fff;
font-weight: bold;
}
</style>
</head>
<body>
<div class="box">
<img src="../image/12.png" >
<div>还可以输入<span class="num"></span>字
</div>
<textarea id="text" rows="10" cols="96"></textarea>
<span id="span1">表情</span>
<span id="span2">图片</span>
<span id="span3">视频</span>
<span id="span4">话题</span>
<span id="span5">长微博</span>
<span id="span6">公开</span>
<input type="button" name="" id="" value="发布" onclick="Draw()"/>
</div>
<script>
//文本域、span数字、可以输入的次数
var text,number,m;
window.onload=function(){
text = document.getElementById('text');
number = document.getElementsByClassName('num')[0];
text.onkeyup = function aa(){
m = 140 - text.value.length;
if(m>0){
number.style.color = "#999"
}else{
number.style.color = "red"
}
number.innerHTML = m;
}
}
//点击
function Draw(){
if(m>0){
alert("发布成功！");
}else{
alert("字数超过最大限制，失败！")
}
}
</script>
</body>
</html>
