????：<!DOCTYPE html><html> <head> <meta charset="utf-8"> <title></title> <style type="text/css"> body { font-size: 12px; } .box {
<!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: 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;
}
.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: 150px;
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('您還沒有輸入');
text.focus();
} else if (m < 0) {
alert('字?jǐn)?shù)超過限制');
text.focus();
} else {
alert('發(fā)布成功');
}
}
aa();
}
</script>
</head>
<body>
<div class="box">
<img src="images/12.png" alt="">
<div class="box1">還可以輸入<span id="number"></span>字</div>
<textarea id="text"></textarea>
<span id='sp1'>表情</span>
<span id='sp2'>圖片</span>
<span id='sp3'>視頻</span>
<span id='sp4'>話題</span>
<span id='sp5'>長(zhǎng)微博</span>
<span id='sp6'>公開</span>
<input type="button" value="發(fā)布" id="bt">
</div>
</body>
</html>
?? ???：滅絕師太?? ??：2019-01-11 09:28:28
???? ??：完成的不錯(cuò)，就是和老師代碼雷同率太高了，這個(gè)作業(yè)還可以用很多種方式完成，可以課外拓展下！