abstract：<!DOCTYPE html><html ><head> <meta charset="UTF-8"> <title>changeDIV</title> <style type ="text/css"> #box {width: 100px; height: 100px;
<!DOCTYPE html>
<html >
<head>
<meta charset="UTF-8">
<title>changeDIV</title>
<style type ="text/css">
#box {width: 100px; height: 100px; background:red;}
</style>
</head>
<body>
<div id="box"></div>
<input type="button" value="变高" onclick = "aa()">
<input type="button" value="变宽" onclick = "bb()">
<input type="button" value="变色" onclick = "cc()">
<input type="button" value="重置" onclick = "dd()">
<input type="button" value="隐藏" onclick = "ee()">
<input type="button" value="显示" onclick = "ff()">
<script type="text/javascript">
var box;
window.onload = function(){//全局调用
box = document.getElementById('box');
}
function aa(){
box.style.height = "400px";
}
function bb(){
box.style.width ="400px";
}
function cc(){
box.style.background = "pink";
}
function dd(){
box.style.height = "100px";
box.style.width = "100px";
box.style.background = "red";
}
function ee(){
box.style.display = "none";
}
function ff(){
box.style.display = "block"; }
</script>
</body>
</html>
Correcting teacher：天蓬老师Correction time：2019-04-03 13:16:20
Teacher's summary：下次根据自己的理解去想去写, 不要照抄源码