摘要：<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>控制DIV样式</title> <style> #box{ width:200px; height:200px; background-color:&nbs
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>控制DIV样式</title>
<style>
#box{
width:200px;
height:200px;
background-color: yellow;
margin:20px 40px;
}
</style>
</head>
<body>
<div id="box"></div>
<input type="button" value="变高" onclick="changeHeight()">
<input type="button" value="变长" onclick="changeWidth()">
<input type="button" value="变色" onclick="changeColor()">
<input type="button" value="重置" onclick="changeSubmit()">
<input type="button" value="隐藏" onclick="changeDisplay_1()">
<input type="button" value="显示" onclick="changeDisplay_2()">
<script type="text/javascript">
var box;
window.onload=function(){
box=document.getElementById("box")
}
function changeHeight(){
box.style.height="400px";
}
function changeWidth(){
box.style.width="400px";
}
function changeColor(){
box.style.backgroundColor="blue"
}
function changeSubmit(){
box.style.height="200px";
box.style.width="200px";
box.style.backgroundColor="yellow"
}
function changeDisplay_1(){
box.style.display="none";
}
function changeDisplay_2(){
box.style.display="block";
}
</script>
</body>
</html>
通过Id查找元素：
document.getElementById("Id名") 注意拼写，如果拼写错误将找不到元素
改变CSS样式：
box.style.background-color="red";是错误的，属性名要使用驼峰式写法
box.style.backgroundColor="red";
批改老师：灭绝师太批改时间：2018-11-22 17:29:58
老师总结：是的，注意事项要记清楚，不然有时会踩坑！继续保持
