<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;}
.one{
????????color:red;
????????background:green;
????}
.two{
???????height:200px;
???????width:300px;
??????
????}
????
.three{
????????display:none;
????}
.four{
????????display:block;
}
</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="changeSS()">
????<input?type="button"?value="隱藏內(nèi)容"?onclick="hidde()">
????<input?type="button"?value="顯示內(nèi)容"?onclick="display1()">
????<input?type="button"?value="取消設(shè)置"?onclick="confirm1()">
??</form>
??<script?type="text/javascript">
//定義"改變顏色"的函數(shù)
function?changeColor(){
????var?a=document.getElementById("txt");
????a.className="one";
}
//定義"改變寬高"的函數(shù)
function?changeSS(){
????var?a=document.getElementById("txt");
????a.className="two";
}
//定義"隱藏內(nèi)容"的函數(shù)
function?hidde(){
????var?a=document.getElementById("txt");
????a.className="three";
}
//定義"顯示內(nèi)容"的函數(shù)
function?display1(){
????var?a=document.getElementById("txt");
????a.className="four";
}
//定義"取消設(shè)置"的函數(shù)
function?confirm1(){
????var?a=confirm("是否取消全部設(shè)置");
????if(a==true){
????????var?a=document.getElementById("txt");
????????a.className=null;
????}
????else;
}
</script>
2016-03-18
function?changeSS(){
????var?a=document.getElementById("txt");
? ?a.style.width="300px";
?a.style.height="200px";
}
是改div的寬高
2016-03-18
function changeSS(){
? ? var a=document.getElementById("txt");
? ? a.style.width = "300px";
? ? a.style.height = "200px";
}