取消設(shè)置，，僅供參考
//定義"取消設(shè)置"的函數(shù) ? ?function isConfirm(){ ? ? ? ?var message = confirm("確定要取消設(shè)置嗎？"); ? ? ? ?if(message == true){ ? ? ? ? ? myChar.style=null; ? ? ? ?} ? ?}
慕婉清4341433
2020-07-23
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2020-08-02
直接removeAttribute就行了
2020-07-26
<!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(yè)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="changeColor()">
???<input type="button" value="改變寬高" onclick="changeWidth()">
???<input type="button" value="隱藏內(nèi)容" onclick="hideText()">
???<input type="button" value="顯示內(nèi)容" onclick="showText()">
???<input type="button" value="取消設(shè)置" onclick="cancelSet()">
??</form>
??<script type="text/javascript">
???//定義變量保存默認(rèn)值
???var color = txt.style.color;
???var backgroundColor = txt.style.backgroundColor;
???var width = txt.style.width;
???var height = txt.style.height;
???var block = txt.style.display;
???//定義"改變顏色"的函數(shù)
???function changeColor(){
?????? txt.style.color="red";
?????? txt.style.backgroundColor="#CCC"
???}
???//定義"改變寬高"的函數(shù)
???function changeWidth() {
????txt.style.width = "300px";
????txt.style.height = "300px";
???}
???//定義"隱藏內(nèi)容"的函數(shù)
???function hideText() {
????txt.style.display = "none";
???}
???//定義"顯示內(nèi)容"的函數(shù)
???function showText() {
????txt.style.display = "block";
???}
???//定義"取消設(shè)置"的函數(shù)
???function cancelSet() {
????var message = confirm("取消設(shè)置？");
????if (message == true) {
?????txt.style.color = color;
?????txt.style.backgroundColor = backgroundColor;
?????txt.style.width = width;
?????txt.style.height = height;
?????txt.style.display = block;
????}
???}
??</script>
?</body>
</html>