<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" Content="text/html; charset=utf-8" />
<title>javascript</title>
<style type="text/css">
body{font-size:12px;}
#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="newColor ()">
<input type="button" value="改变宽高" onclick="newWandH ()">
<input type="button" value="隐藏内容" onclick="newDisplay ()">
<input type="button" value="显示内容" onclick="newBlock ()">
<input type="button" value="取消设置" onclick="newSetting ()">
</form>
<script type="text/javascript">
//定义"改变颜色"的函数
function newColor (){
var changeColor = confirm("是否修改颜色");
if (changeColor == true){
var h2Color = document.getElementById("con");
h2Color.style.color = "skyblue";
}
}
//定义"改变宽高"的函数
function newWandH (){
var changeWandH = confirm("是否修改正文宽高");
if (changeWandH == true){
var txtWandH = document.getElementById("txt");
txtWandH.style.width = "800px";
txtWandH.style.height = "800px";
}
}
//定义"隐藏内容"的函数
function newDisplay (){
var changeDisplay = confirm("是否隐藏内容");
if (changeDisplay == true){
var pDisplay = document.getElementById("txt");
pDisplay.style.display="none";
}
}
//定义"显示内容"的函数
function newBlock (){
var changeBlock = confirm("是否显示内容");
if (changeBlock == true){
var txtBlock = document.getElementById("txt");
txtBlock.style.display = "block";
}
}
//定义"取消设置"的函数
function newSetting (){
var changeSetting = confirm("是否修改颜色");
if (changeSetting == true){
var qSetting = document.getElementById("con");
qSetting.style.color = "black";
var rSetting = document.getElementById("txt");
rSetting.style.width = "600px"
rSetting.style.height = "400px"
rSetting.style.display = "block"
}
}
</script>
</body>
</html>
let con=document.getElementById("con");
let txt=document.getElementById("txt");
function confirmfun(txt,callback){
if(confirm(txt)){
callback();
}
}
//定义"改变颜色"的函数
function changeColor(color="#fff"){
confirmfun("是否改变颜色",function(){
txt.style.color=color;
txt.style.backgroundColor="#000";
});
}
//定义"改变宽高"的函数
function changeWidth(width="300px",height="200px"){
confirmfun("是否改变宽高",function(){
txt.style.width=width;
txt.style.height=height;
});
}
//定义"隐藏内容"的函数
function changeHide(){
confirmfun("是否隐藏内容",function(){
txt.style.display="none";
});
}
//定义"显示内容"的函数
function changeShow(){
confirmfun("是否显示内容",function(){
txt.style.display="block";
});
}
//定义"取消设置"的函数
function clearStyle(){
if(confirm("是否取消所有设置")){
txt.removeAttribute("style");
}
}
审题错了