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                        /JavaScript入門篇

我覺(jué)得我的做的是最難的，不要問(wèn)我為什么定義這么多

<!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;
??? background:#ccc;
}
p{
?line-height:18px;
?text-indent:2em;
??? color:black;
???
}

</style>
</head>
<body >
? <h2 id="con">JavaScript課程</H2>
? <div id="txt">
???? <h5>JavaScript為網(wǎng)頁(yè)添加動(dòng)態(tài)效果并實(shí)現(xiàn)與用戶交互的功能。</h5>
??????? <p id=pp>1. JavaScript入門篇，讓不懂JS的你，快速了解JS。</p>
??????? <p id=pp2>2. JavaScript進(jìn)階篇，讓你掌握J(rèn)S的基礎(chǔ)語(yǔ)法、函數(shù)、數(shù)組、事件、內(nèi)置對(duì)象、BOM瀏覽器、DOM操作。</p>
??????? <p id=pp3>3. 學(xué)完以上兩門基礎(chǔ)課后，在深入學(xué)習(xí)JavaScript的變量作用域、事件、對(duì)象、運(yùn)動(dòng)、cookie、正則表達(dá)式、ajax等課程。</p>
? </div>
? <form>
? 
??? <input type="button" value="改變顏色" onclick="ys()"/>?
??? <input type="button" value="改變寬高" onclick="kg()"/>
??? <input type="button" value="隱藏內(nèi)容" onclick="yc()"/>
??? <input type="button" value="顯示內(nèi)容" onclick="xs()"/>
??? <input type="button" value="取消設(shè)置" onclick="qxsz()"/>
? </form>
? <script type="text/javascript">
? function ys(){
????? var mycolor=document.getElementById("txt");
????? var mecolor=document.getElementById("pp");
????? var pp2=document.getElementById("pp2");
????? var pp3=document.getElementById("pp3");
????? mecolor.style.color="red";
????? mycolor.style.color="red";
????? pp2.style.color="red";
????? pp3.style.color="red";
????? mycolor.style.backgroundColor="#369";
? }//定義"改變顏色"的函數(shù)
? function kg(){
????? var mywidth=document.getElementById("txt");
????? mywidth.style.width="400px";
????? mywidth.style.height="500px";
? }
//定義"改變寬高"的函數(shù)
? function yc(){
????? var mynone=document.getElementById("txt");
????? mynone.style.display="none";
? }
? function xs(){
????? var myblock=document.getElementById("txt");
????? myblock.style.display="block";
? }
? function qxsz(){
????? var
????? myqxsz=confirm("你是否取消設(shè)置？");
????? if(myqxsz==true)
????? {
??????? document.getElementById("txt").style.color="black";
??????? document.getElementById("pp").style.color="black";
??????? document.getElementById("pp2").style.color="black";
??????? document.getElementById("pp3").style.color="black";
??????? document.getElementById("txt").style.backgroundColor="#ccc";
???????
??????? document.getElementById("txt").style.width="600px";
??????? document.getElementById("txt").style.height="400px";
???????
??????? document.getElementById("txt").style.display="null";
??????? document.getElementById("txt").style.display="null";
????? }
????? else{
????????? alert("您已經(jīng)取消此操作！");
????? }
? }
? //className只能從class定義的類里面應(yīng)用CSS樣式，由于我對(duì)className的用法不明確，導(dǎo)致走了很多彎路
? //removeAttribute只能消除CSS的樣式，所以也是導(dǎo)致一改全改的問(wèn)題!