微薄输入功能实现
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>微薄输入</title>
<style>
.box{
font-size: 12px;
width: 600px;
height: 160px;
border: 10px solid pink;
padding: 10px;
margin: 0 auto;
}
img{
float: left;
}
.box1{
float: left;
margin-left: 255px;
width: 150px;
height: 24px;
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;}
#sp6{
margin-left: 150px;
margin-right: 15px;
color: #888888;
}
#bt{
float: left;
width: 80px;
height: 30px;
border: none;
background-color: #ffc09f;
color: #ffffff;
border-radius: 5px;
}
</style>
<script>
var text,number,bt,m;
window.onload = function () {
text = document.getElementById('text');
number = document.getElementById('number');
bt = document.getElementById('bt');
text.onkeyup = function inputText() {
m = 140 -text.value.length; //获取剩余可输入字符数量
if (m < 0){
number.style.color = 'rad';
}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('字数超出限制');
text.focus()
} else {
alert('发布成功')
}
};
inputText();
}
</script>
</head>
<body>
<div class="box">
<img src="images/12.png" alt="">
<div class="box1">还可以输入 <span id="number">140</span> 字</div>
<textarea name="" id="text" cols="30" rows="10"></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" style="width: 40px">长微博</span>
<span id="sp6">公开</span>
<input id="bt" type="button" value="发布">
</div>
</body>
</html>