摘要：<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>仿微博前端案例</title></head><style> &
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>仿微博前端案例</title>
</head>
<style>
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 #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: 150px;margin-right: 15px;color: #888;}
#bt{float: right;width: 80px;height: 30px;border: none;background: #ffc09f;border-radius: 5px;}
</style>
<body>
<div class="box">
<img src="images/12.png" alt="">
<div class="box1">还可以输入 <span id="number"></span>字</div>
<textarea name="" id="text" cols="" rows=""></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>
<script>
window.onload=function () {
var text=document.getElementById('text')
var number=document.getElementById('number')
var bt=document.getElementById('bt')
var m
text.onkeyup=aa()
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('请输入要发布的内容')
text.focus()
}else if(m<0){
alert('字数超限')
text.focus()
}else{
alert('发布成功')
}
}
aa()
}
</script>
</body>
</html>
批改老师：韦小宝批改时间：2019-02-13 09:17:55
老师总结：写的很棒 这一节课就是为了复习之前学习的js部分 课后没事多练习练习
