javascript入门·图片对象(无刷新变换图片)\滚动图像

演示一：无刷新变换图片（有点歪）

演示二：鼠标触发图片变换（书面名称好像叫图像滚动）

http://thcjp.cnblogs.com')" onmouseout="off('play');return setmsg('');" height=120 src="https://www.cnblogs.com/thcjp/archive/2006/08/18/img/1.jpg" width=80 border=0 name=play twffan="done"> http://www.cnblogs.com/thcjp/category/65304.html')" onmouseout="off('stop');return setmsg('')" height=120 src="http://localhost/js/01/img/2.jpg" width=80 border=0 name=stop twffan="done">

http://thcjp.cnblogs.com')" onmouseout="off('rewind');return setmsg('');" height=120 src="http://localhost/js/01/img/1.jpg" width=80 border=0 name=rewind twffan="done">

<%@LANGUAGE="JAVASCRIPT" CODEPAGE="936"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<head>

<!--

//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>

<p><strong>演示一：无刷新变换图片（有点歪）</strong></p>

<p>

</select>

</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>

//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>

<tr>

<tr>

</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>

<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://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>

posted @ 2007-11-27 14:35 曹振华阅读(464) 评论(0) 编辑收藏举报

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