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<%@LANGUAGE="JavaSCRIPT" CODEPAGE="936"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>圖片對(duì)象</title>
<script language="Javascript">
<!--
//書上說這樣可以預(yù)緩存圖片對(duì)象，實(shí)際是騙人的了。下面是我 特意整的特別大的圖片
img1=new Image(300,400)
img1.src="http://www.azsz.com/test/view/1.jpg"
img2=new Image(300,400)
img2.src="http://www.azsz.com/test/view/2.jpg"
img3=new Image(300,400)
img3.src="http://www.azsz.com/test/view/3.jpg"
img4=new Image(300,400)
img4.src="http://www.azsz.com/test/view/4.jpg"
function img(s){//根據(jù)下拉菜單傳來的值，也就是被選中項(xiàng)調(diào)用函數(shù)
im=document.getElementById("select1").options[s].value;//得到被選中項(xiàng)的值
document.getElementById("img").src=eval(im+".src")//使用eval()函數(shù)引用對(duì)象的src值并賦給頁面上的圖片
}
//下面是DW自動(dòng)生成的，所以有點(diǎn)不好看，懶得看了，麻煩啊，下面有我自己參考書上寫的
function MM_preloadImages() { //v3.0
var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}
function MM_findObj(n, d) { //v4.01
var p,i,x; if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
if(!x && d.getElementById) x=d.getElementById(n); return x;
}
function MM_nbGroup(event, grpName) { //v6.0
var i,img,nbArr,args=MM_nbGroup.arguments;
if (event == "init" && args.length > 2) {
if ((img = MM_findObj(args[2])) != null && !img.MM_init) {
img.MM_init = true; img.MM_up = args[3]; img.MM_dn = img.src;
if ((nbArr = document[grpName]) == null) nbArr = document[grpName] = new Array();
nbArr[nbArr.length] = img;
for (i=4; i < args.length-1; i+=2) if ((img = MM_findObj(args[i])) != null) {
if (!img.MM_up) img.MM_up = img.src;
img.src = img.MM_dn = args[i+1];
nbArr[nbArr.length] = img;
} }
} else if (event == "over") {
document.MM_nbOver = nbArr = new Array();
for (i=1; i < args.length-1; i+=3) if ((img = MM_findObj(args[i])) != null) {
if (!img.MM_up) img.MM_up = img.src;
img.src = (img.MM_dn && args[i+2]) ? args[i+2] : ((args[i+1])? args[i+1] : img.MM_up);
nbArr[nbArr.length] = img;
}
} else if (event == "out" ) {
for (i=0; i < document.MM_nbOver.length; i++) {
img = document.MM_nbOver[i]; img.src = (img.MM_dn) ? img.MM_dn : img.MM_up; }
} else if (event == "down") {
nbArr = document[grpName];
if (nbArr)
for (i=0; i < nbArr.length; i++) { img=nbArr[i]; img.src = img.MM_up; img.MM_dn = 0; }
document[grpName] = nbArr = new Array();
for (i=2; i < args.length-1; i+=2) if ((img = MM_findObj(args[i])) != null) {
if (!img.MM_up) img.MM_up = img.src;
img.src = img.MM_dn = (args[i+1])? args[i+1] : img.MM_up;
nbArr[nbArr.length] = img;
} }
}
//-->
</script>
</head>
<body onload="MM_preloadImages('img/3.jpg','img/2.jpg','img/4.jpg')">
<p><strong>演示一：無刷新變換圖片（有點(diǎn)歪）</strong></p>
<p>
<select name="select1" onchange="img(this.options.selectedIndex)">
<option value="img1">1</option>
<option value="img2">2</option>
<option value="img3">3</option>
<option value="img4">4</option>
</select>
<input type="image" name="img" src="img/7.jpg" />
</p>
<p><strong>演示二：鼠標(biāo)觸發(fā)圖片變換（書面名稱好像叫圖像滾動(dòng)）</strong></p>
<p>
<script language="Javascript">
//先建立兩個(gè)數(shù)組，一組是on 狀態(tài)的，一組是off狀態(tài)的
//數(shù)組使用的是字符串作索引，一來方便識(shí)別，二來在代碼運(yùn)行中不會(huì)沖突
offimg=new Array()
offimg["play"]=new Image(60,50)
offimg["stop"]=new Image(60,50)
offimg["pause"]=new Image(60,50)
offimg["rewind"]=new Image(66,55)
//賦值
offimg["play"].src="img/1.jpg"
offimg["stop"].src="img/2.jpg"
offimg["pause"].src="img/3.jpg"
offimg["rewind"].src="img/4.jpg"
//第二個(gè)數(shù)組
onimg=new Array()
onimg["play"]=new Image(60,50)
onimg["stop"]=new Image(60,50)
onimg["pause"]=new Image(60,50)
onimg["rewind"]=new Image(66,55)
//賦值
onimg["play"].src="img/5.jpg"
onimg["stop"].src="img/6.jpg"
onimg["pause"].src="img/7.jpg"
onimg["rewind"].src="img/1.jpg"
function on(imgname){
if(document.images){//判斷瀏覽器是否能夠處理圖片對(duì)象
document.images[imgname].src=onimg[imgname].src//將對(duì)應(yīng)的圖片對(duì)象的src值賦給圖片
}
}
function off(imgname){
if(document.images){//判斷瀏覽器是否能夠處理圖片對(duì)象
document.images[imgname].src=offimg[imgname].src//將對(duì)應(yīng)的圖片對(duì)象的src值賦給圖片
}
}
function setmsg(msg){//改變狀態(tài)欄提示
window.status=msg;
return true;
}
</script>
<table width="591" border="1">
<tr>
<td width="169"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><a /></a></td>
</tr>
</table>
<p><a >上面是DW做的<br />
是預(yù)載入圖片</a></p></td>
<td width="406">
<a /></a>
<a /></a>
<a /></a>
<a /></a></td>
</tr>
</table>
</body>
</html>
JavaScript技術(shù)：javascript入門&#183;圖片對(duì)象(無刷新變換圖片)/滾動(dòng)圖像，轉(zhuǎn)載需保留來源！
鄭重聲明：本文版權(quán)歸原作者所有，轉(zhuǎn)載文章僅為傳播更多信息之目的，如作者信息標(biāo)記有誤，請(qǐng)第一時(shí)間聯(lián)系我們修改或刪除，多謝。
