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                        /JavaScript入門篇

我看了好幾遍都沒看出來哪兒錯(cuò)了，點(diǎn)擊按鈕都沒反應(yīng)

<!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課程</H2>
??<div?id="txt">?
?????<h5>JavaScript為網(wǎng)頁添加動(dòng)態(tài)效果并實(shí)現(xiàn)與用戶交互的功能。</h5>
????????<p>1.?JavaScript入門篇，讓不懂JS的你，快速了解JS。</p>
????????<p>2.?JavaScript進(jìn)階篇，讓你掌握J(rèn)S的基礎(chǔ)語法、函數(shù)、數(shù)組、事件、內(nèi)置對(duì)象、BOM瀏覽器、DOM操作。</p>
????????<p>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>
??<!--當(dāng)點(diǎn)擊相應(yīng)按鈕，執(zhí)行相應(yīng)操作，為按鈕添加相應(yīng)事件-->
????<input?type="button"?value="改變顏色"?onclick="myColor()">??
????<input?type="button"?value="改變寬高"?onclick="myWH()">
????<input?type="button"?value="隱藏內(nèi)容"?onclick="myHide()">
????<input?type="button"?value="顯示內(nèi)容"?onclick="myDisplay()">
????<input?type="button"?value="取消設(shè)置"?onclick="myRemove()">
??</form>
??<script?type="text/javascript">
????var?myChar?=?document.getElementById("txt");
//定義"改變顏色"的函數(shù)
????function?myColor{
????????myChar.style.color="pink";
????????myChar.style.backgroundColor="green";
?????}

//定義"改變寬高"的函數(shù)
????function?myWH{
????????myChar.style.width="700px";
????????myChar.style.height="500px";
?????}

//定義"隱藏內(nèi)容"的函數(shù)
????function?myHide{
????????myChar.style.display="none";

?????}

//定義"顯示內(nèi)容"的函數(shù)
????function?myDisplay{
????????myChar.style.color="block";
????????
?????}

//定義"取消設(shè)置"的函數(shù)
????function?myRemove{
????????var?myVar?=?confirm("是否取消設(shè)置?");
????????if(myVar==?true){
????????????myChar.removeAttribute("style");
????????}
???????
?????}
??</script>
</body>
</html>