看著沒有錯(cuò)誤 但是不知道為什么就是運(yùn)行不出來
<!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">
????????<input?type="button"?value="改變寬高">
????????<input?type="button"?value="隱藏內(nèi)容">
????????<input?type="button"?value="顯示內(nèi)容">
????????<input?type="button"?value="取消設(shè)置">
????</form>
????<script?type="text/javascript">
????????var?mydiv?=?document.getElementById("txt");
????????//定義"改變顏色"的函數(shù)
????????function?changeColor()?{
????????????mydiv.style.color?=?"red";
????????????mydiv.style.backgroundColor?=?"#999";
????????}
????????//定義"改變寬高"的函數(shù)
????????function?changeSize()?{
????????????mydiv.style.width?=?"50px";
????????????mydiv.style.height?=?"70px";
????????}
????????//定義"隱藏內(nèi)容"的函數(shù)
????????function?hidetext()?{
????????????mydiv.style.display?=?"none";
????????}
????????//定義"顯示內(nèi)容"的函數(shù)
????????function?showtext()?{
????????????mydiv.style.display?=?"block";
????????}
????????//定義"取消設(shè)置"的函數(shù)
????????function?resettext()?{
????????????var?mychose?=?confirm();
????????????if?(mychose?==?true)?{
????????????????mydiv.removeAttribute("style");
????????????}
????????}
????</script>
</body>
</html>
2020-05-27
? ? <input?type="button"?value="改變顏色" onclick="changeColor">
? ? <input?type="button"?value="改變顏色" onclick="changeColor">
? ? <input?type="button"?value="改變寬高" onclick="changeSize">
......
2020-05-26
你按鈕式上都沒綁定事件啊，要寫上? ? ? ? ? onclick="點(diǎn)擊事件的函數(shù)"
2020-05-26
按鈕沒加onclick="functionname()"