javascript入门·图片对象(无刷新变换图片)\滚动图像
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2023-11-06 19:16:58
复制代码 代码如下:<%@language="javascript" codepage="936"%>
<%@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>图片对象</title>
<script language="javascript">
<!--
//书上说这样可以预缓存图片对象，实际是骗人的了。下面是我 特意整的特别大的图片
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){//根据下拉菜单传来的值，也就是被选中项调用函数
im=document.getelementbyid("select1").options[s].value;//得到被选中项的值
document.getelementbyid("img").src=eval(im+".src")//使用eval()函数引用对象的src值并赋给页面上的图片
}
//下面是dw自动生成的，所以有点不好看，懒得看了，麻烦啊，下面有我自己参考书上写的
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：无刷新变换图片（有点歪）</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：鼠标触发图片变换（书面名称好像叫图像滚动）</strong></p>
<p>
<script language="javascript">
//先建立两个数组，一组是on 状态的，一组是off状态的
//数组使用的是字符串作索引，一来方便识别，二来在代码运行中不会冲突
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)
//赋值
offimg["play"].src="img/1.jpg"
offimg["stop"].src="img/2.jpg"
offimg["pause"].src="img/3.jpg"
offimg["rewind"].src="img/4.jpg"
//第二个数组
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)
//赋值
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){//判断浏览器是否能够处理图片对象
document.images[imgname].src=onimg[imgname].src//将对应的图片对象的src值赋给图片
}
}
function off(imgname){
if(document.images){//判断浏览器是否能够处理图片对象
document.images[imgname].src=offimg[imgname].src//将对应的图片对象的src值赋给图片
}
}
function setmsg(msg){//改变状态栏提示
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 href="http://thcjp.cnblogs.com" target="_top" onclick="mm_nbgroup('down','group1','blogs','img/3.jpg',1)" onmouseover="mm_nbgroup('over','blogs','img/2.jpg','img/4.jpg',1)" onmouseout="mm_nbgroup('out')"><img src="img/1.jpg" alt="田轰穿博客" name="blogs" width="80" height="120" border="0" id="blogs" onload="" /></a></td>
</tr>
</table>
<p><a href="http://thcjp.cnblogs.com">上面是dw做的<br />
是预载入图片</a></p></td>
<td width="406">
<a href="http://thcjp.cnblogs.com"><img src="img/1.jpg" width="80" height="120" border="0" name="play" onmouseover="on('play');return setmsg('我的教程博客 --> http://thcjp.cnblogs.com')" onmouseout="off('play');return setmsg('');" /></a>
<a href="http://www.cnblogs.com/thcjp/category/65304.html"><img src="img/2.jpg" width="80" height="120" border="0" name="stop" onmouseover="on('stop');return setmsg('天轰穿的博客之js入门系列教程--> http://www.cnblogs.com/thcjp/category/65304.html')" onmouseout="off('stop');return setmsg('')"/></a>
<a href="http://www.cnblogs.com/thcjp/category/59325.html"><img src="img/3.jpg" width="80" height="120" border="0" name="pause" onmouseover="on('pause');return setmsg('vs2005控件系列教程 http://www.cnblogs.com/thcjp/category/59325.html')" onmouseout="off('pause');return setmsg('')"/></a>
<a href="http://thcjp.cnblogs.com"><img src="img/4.jpg" width="80" height="120" border="0" name="rewind" onmouseover="on('rewind');return setmsg('ajax系列视频教程 --> http://thcjp.cnblogs.com')" onmouseout="off('rewind');return setmsg('');" /></a></td>
</tr>
</table>
</body>
</html>
复制代码 代码如下:
<%@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>图片对象</title>
<script language="javascript">
<!--
//书上说这样可以预缓存图片对象，实际是骗人的了。下面是我 特意整的特别大的图片
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){//根据下拉菜单传来的值，也就是被选中项调用函数
im=document.getelementbyid("select1").options[s].value;//得到被选中项的值
document.getelementbyid("img").src=eval(im+".src")//使用eval()函数引用对象的src值并赋给页面上的图片
}
//下面是dw自动生成的，所以有点不好看，懒得看了，麻烦啊，下面有我自己参考书上写的
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：无刷新变换图片（有点歪）</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：鼠标触发图片变换（书面名称好像叫图像滚动）</strong></p>
<p>
<script language="javascript">
//先建立两个数组，一组是on 状态的，一组是off状态的
//数组使用的是字符串作索引，一来方便识别，二来在代码运行中不会冲突
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)
//赋值
offimg["play"].src="img/1.jpg"
offimg["stop"].src="img/2.jpg"
offimg["pause"].src="img/3.jpg"
offimg["rewind"].src="img/4.jpg"
//第二个数组
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)
//赋值
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){//判断浏览器是否能够处理图片对象
document.images[imgname].src=onimg[imgname].src//将对应的图片对象的src值赋给图片
}
}
function off(imgname){
if(document.images){//判断浏览器是否能够处理图片对象
document.images[imgname].src=offimg[imgname].src//将对应的图片对象的src值赋给图片
}
}
function setmsg(msg){//改变状态栏提示
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 href="http://thcjp.cnblogs.com" target="_top" onclick="mm_nbgroup('down','group1','blogs','img/3.jpg',1)" onmouseover="mm_nbgroup('over','blogs','img/2.jpg','img/4.jpg',1)" onmouseout="mm_nbgroup('out')"><img src="img/1.jpg" alt="田轰穿博客" name="blogs" width="80" height="120" border="0" id="blogs" onload="" /></a></td>
</tr>
</table>
<p><a href="http://thcjp.cnblogs.com">上面是dw做的<br />
是预载入图片</a></p></td>
<td width="406">
<a href="http://thcjp.cnblogs.com"><img src="img/1.jpg" width="80" height="120" border="0" name="play" onmouseover="on('play');return setmsg('我的教程博客 --> http://thcjp.cnblogs.com')" onmouseout="off('play');return setmsg('');" /></a>
<a href="http://www.cnblogs.com/thcjp/category/65304.html"><img src="img/2.jpg" width="80" height="120" border="0" name="stop" onmouseover="on('stop');return setmsg('天轰穿的博客之js入门系列教程--> http://www.cnblogs.com/thcjp/category/65304.html')" onmouseout="off('stop');return setmsg('')"/></a>
<a href="http://www.cnblogs.com/thcjp/category/59325.html"><img src="img/3.jpg" width="80" height="120" border="0" name="pause" onmouseover="on('pause');return setmsg('vs2005控件系列教程 http://www.cnblogs.com/thcjp/category/59325.html')" onmouseout="off('pause');return setmsg('')"/></a>
<a href="http://thcjp.cnblogs.com"><img src="img/4.jpg" width="80" height="120" border="0" name="rewind" onmouseover="on('rewind');return setmsg('ajax系列视频教程 --> http://thcjp.cnblogs.com')" onmouseout="off('rewind');return setmsg('');" /></a></td>
</tr>
</table>
</body>
</html>
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