<!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為網頁添加動態效果并實現與用戶交互的功能。</h5>
????????<p>1.?JavaScript入門篇，讓不懂JS的你，快速了解JS。</p>
????????<p>2.?JavaScript進階篇，讓你掌握JS的基礎語法、函數、數組、事件、內置對象、BOM瀏覽器、DOM操作。</p>
????????<p>3.?學完以上兩門基礎課后，在深入學習JavaScript的變量作用域、事件、對象、運動、cookie、正則表達式、ajax等課程。</p>
??</div>
??<form>
??<!--當點擊相應按鈕，執行相應操作，為按鈕添加相應事件-->
????<input?type="button"?value="改變顏色"?onclick="changeColor()"?>??
????<input?type="button"?value="改變寬高"?onclick="changeSize()">
????<input?type="button"?value="隱藏內容"?onclick="hidetext()">
????<input?type="button"?value="顯示內容"?onclick="showtext()">
????<input?type="button"?value="取消設置"?onclick="resettext()">
??</form>
??<script?type="text/javascript">
??var?mycha?=?document.getElementById("con");
??var?mychar?=?document.getElementById("txt");
//定義"改變顏色"的函數
????function?changeColor()
????{
?????mychar.style.color="blue";
?????mychar.style.backgroundColor="red";
????}
//定義"改變寬高"的函數
????function?changeSize()
????{
?????????mychar.style.width="300px";
?????????mychar.style.height="500px";
????}
//定義"隱藏內容"的函數
????function?hidetext()
????{
????
????mychar.style.display="none";
????????
????}
//定義"顯示內容"的函數
????function?showtext()
????{
????mychar.style.display="block";
????}
//定義"取消設置"的函數
????function?resettext()
????var?mychar?=?confirm("確認要重置嗎？");
????if?(mychar==true)
????{
????????txt.removeAttribute('style');??
????}
????else
????{
????????
????}
??</script>
</body>
</html>
2016-02-26
你的這里有問題
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//定義"取消設置"的函數
????function?resettext()
????var?mychar?=?confirm("確認要重置嗎？");
????if?(mychar==true)
????{
????????txt.removeAttribute('style');??
????}
????else
????{
?????????
????}
---------------------------------------------------------------------------------
function少了一個括號{
}
正確的應當是
---------------------------------------------------------------------------------
//定義"取消設置"的函數
????function?resettext()
{
????var?mychar?=?confirm("確認要重置嗎？");
????if?(mychar==true)
????{
????????txt.removeAttribute('style');??
????}
????else
????{
?????????
????}
}
---------------------------------------------------------------------------------