<!DOCTYPE?HTML>
<html>
<head>
<meta?http-equiv="txttent-Type"?txttent="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、對象、運(yùn)動、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="changeColor()">??????
????????<input?type="button"?value="改變寬高"?onClick="changeSize()">????
????????<input?type="button"?value="隱藏內(nèi)容"?onClick="hidetext()">????
????????<input?type="button"?value="顯示內(nèi)容"?onClicl="showtext()">????
????????<input?type="button"?value="取消設(shè)置"?onClick="cancelset()">??
????</form>??
????<script?type="text/javascript">??
????????var?mychar=document.getElementById("con");??
????????var?char=document.getElementById("txt");?
????????function?changeColor(){??
????????mychar.style.color="purple";??
????????mychar.style.backgroundcolor="yellow";??
????????char.style.color="red";??
????????char.style.backgroundcolor="blue";}//定義"改變顏色"的函數(shù)
????????function?changeSize(){
????????char.style.width="200px";
????????char.style.height="300px";}//定義"改變寬高"的函數(shù)
????????function?hidetext(){
????????char.style.display="none";}//定義"隱藏內(nèi)容"的函數(shù)
????????function?showtext(){
????????char.style.display="block";}//定義"顯示內(nèi)容"的函數(shù)
????????function?cancelset(){
????????var?set=confirm("是否要取消設(shè)置？");
????????if(set==true){char.removeAttribute("style");
????????elsealert("那就不取消唄");}//定義"取消設(shè)置"的函數(shù)}??
?????</script>
</body>
</html>
為什么不能實(shí)現(xiàn)備注功能？
qq_慕姐8488802
2019-03-31 22:21:27