摘要：<!DOCTYPE html><html> <head> <meta charset="UTF-8"> <title></title> </head> <style> body{font-size: 12px;} .box{height: 160px;width: 600px
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<style>
body{font-size: 12px;}
.box{height: 160px;width: 600px;border: 5px solid pink;padding:10px}
.box img{float: left;}
.box div{height: 24px; width:150px;float: left;margin-left: 255px;text-align: right;color: #888;font-size: 14px;}
.box #number{font-weight: bold;font-size: 16px;}
.box #text{height: 100px;width: 600px;}
.box #sp1,#sp2,#sp3,#sp4,#sp5,#sp6{float:left;height:32px;width: 30px;line-height: 32px;padding-left: 26px;}
.box #sp5{width: 40px;}
.box #sp6{margin-left:150px;margin-right: 20px;}
.box #sp1{background: url(../img/an5.png) no-repeat left center;}
.box #sp2{background: url(../img/an4.png) no-repeat left center;}
.box #sp3{background: url(../img/an3.png) no-repeat left center;}
.box #sp4{background: url(../img/an2.png) no-repeat left center;}
.box #sp5{background: url(../img/an1.png) no-repeat left center;}
.box input{float: left;width: 80px;height: 30px;border: none;background: #FFC09F;border-radius: 5px;color: #FFFFFF;}
</style>
<body>
<div class="box">
<img src="../img/12.png" />
<div>还可以输入<span id="number">140</span>字</div>
<textarea id="text" onkeyup="enter()"></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="btn" onclick="submint()">
</div>
</body>
<script>
var text1,number1,m
window.onload = function(){
text1 = document.getElementById("text");
number1 = document.getElementById("number")
}
//输入字数判断
function enter(){
m = 140-text1.value.length
number1.innerHTML = m
if(m<0){
number1.style.color = "red"
}else{
number1.style.color = "#888"
}
}
//是否可以发布判断
function submint(){
if(m>=0){
alert("发布成功")
}else if(m<0){
text1.focus()
alert("已超出可输入字数")
}else{
text1.focus()
alert("输入不能为空")
}
}
</script>
</html>
函数的另一种方法 被调用元调用
素的id . 事件名 = function 函数名(){ }
改变元素内容 innerHTML
文本域获取焦点 text.focus()
批改老师：灭绝师太批改时间：2018-11-08 14:55:29
老师总结：完成的不错， 被调用元调用素的id . 事件名 = function { } 不要加函数名也ok，这个叫匿名函数
