摘要：<!DOCTYPE html> <html> <head> <title>微博输入字数（2）</title> <meta charset="utf-8"> <style type="text/css"> .box{width:
<!DOCTYPE html>
<html>
<head>
<title>微博输入字数（2）</title>
<meta charset="utf-8">
<style type="text/css">
.box{width: 600px;height: 200px;border: 10px solid pink;padding: 10px;}
.img1{float: left;}
.box1{float: right;margin-right: 10px;font-size: 14px;color: #888;height: 30px;}
#text1{width: 590px;height: 120px;border: 1px solid #ccc;}
.box #span1,#span2,#span3,#span4,#span5,#span6{
width: 35px;height: 40px;line-height: 40px;float: left;padding-left: 25px;font-size: 12px;
}
#span1{background: url(images/an5.png) no-repeat left center;}
#span2{background: url(images/an4.png) no-repeat left center;}
#span3{background: url(images/an3.png) no-repeat left center;}
#span4{background: url(images/an2.png) no-repeat left center;}
#span5{background: url(images/an1.png) no-repeat left center;width: 50px;}
#span6{margin-left: 120px;margin-right: 10px;}
#button1{width: 90px;height: 35px;background-color: pink;float: left;border: none;color: #fff;}
</style>
</head>
<body>
<script type="text/javascript">
window.onload=function () {
var nu,m,text,bt;
nu=document.getElementById('number')
bt=document.getElementById('button1')
text=document.getElementById('text1')
text.onkeyup=function aa() {
m=140-text.value.length
if (m<0) {
nu.style.color="red"
}else{
nu.style.color="#888"
}
nu.innerHTML=m
}
bt.onclick=function bb() {
if (m==140) {
alert("请输入内容");
text.focus()
}else if (m<0) {
alert("字数超出限制")
text.focus()
}else{
alert("发布成功")
}
}
}
</script>
<div class="box">
<img src="images/12.png" class="img1">
<div class="box1">还可以输入<span id="number"></span>字</div>
<textarea id="text1"></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="button1" value="发布">
</div>
</body>
</html>
批改老师：灭绝师太批改时间：2019-01-15 09:11:55
老师总结：完成的不错，aa()这个函数名可以去掉，老师这里创建的aa()是没必要的……
