<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=Edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>HTML</title>
<style>
body {
font-size: 12px;
margin: 0;
}
#txt {
height: 400px;
width: 600px;
border: #333 solid 1px;
padding: 5px;
}
p {
line-height: 18px;
text-indent: 2em;
}
</style>
</head>
<body>
<h2 id="con">JavaScript课程</H2>
<div id="txt">
<h5>JavaScript为网页添加动态效果并实现与用户交互的功能。</h5>
<p>1. JavaScript入门篇，让不懂JS的你，快速了解JS。</p>
<p>2. JavaScript进阶篇，让你掌握JS的基础语法、函数、数组、事件、内置对象、BOM浏览器、DOM操作。</p>
<p>3. 学完以上两门基础课后，在深入学习JavaScript的变量作用域、事件、对象、运动、cookie、正则表达式、ajax等课程。</p>
</div>
<form>
<!--当点击相应按钮，执行相应操作，为按钮添加相应事件-->
<input type="button" value="改变颜色" onclick="a()">
<input type="button" value="改变宽高" onclick="b()">
<input type="button" value="隐藏内容" onclick="c()">
<input type="button" value="显示内容" onclick="d()">
<input type="button" value="取消设置" onclick="e()">
</form>
<script>
function a() {
var k = document.getElementById("txt");
k.style.color = "#FE3EA2";
k.style.backgroundColor = "#000fff"
}
function b() {
var z = document.getElementById("txt");
z.style.width = "355px";
z.style.height = "255px"
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function c() {
var w = document.getElementById("txt");
w.style.display = "none";
}
function d() {
var h = document.getElementById("txt");
h.style.display = "block";
}
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var z = confirm("是否取消设置");
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x = document.getElementById("txt");
x.style.color = "black";
x.style.backgroundColor = "#fff";
x.style.width = "600px";
x.style.height = "400px";
x.style.display = "block";
}
}
</script>
</body>
</html>
removeAttribute('style');