[JS代码]用JavaScript实现网页轮换广告效果

(http://www.webjx.com/htmldata/2005-11-26/1132968209.html
)
演示效果：http://www.webjx.com/htmldata/2005-11-26/test.html

<script LANGUAGE="javascript">

<!--

var cpAD=new Array();

var cpADlink=new Array();

var cpADmsg=new Array();

//定义了5个数组

var adNum=5;

var coll=0;

//ad/1.html 那时你链接的广告地址

cpAD[0]="banners/mba.gif";

cpADlink[0]="ad/1.html";

cpADmsg[0]="1";

cpAD[1]="banners/google.gif";

cpADlink[1]="ad/2.html"

cpADmsg[1]="2";

cpAD[2]="banners/2005.gif";

cpADlink[2]="ad/3.html";

cpADmsg[2]="3";

cpAD[3]="banners/cz8y.gif";

cpADlink[3]="ad/4.html";

cpADmsg[3]="4";

cpAD[4]="banners/JG_YUEDU.gif";

cpADlink[4]="ad/5.html";

cpADmsg[4]="5";

var preloadedimages=new Array();

for (i=1;i<cpAD.length;i++){

preloadedimages[i]=new Image();

preloadedimages[i].src=cpAD[i];

}

//跳转的URL地址

function jump2url()

{

jumpUrl=cpADlink[adNum];

jumpTarget='_blank';

if (jumpUrl != '')

{

if (jumpTarget != '')

window.open(jumpUrl,jumpTarget);

else location.href=jumpUrl;

}

}

//图片变化的函数

function changeimg(n)

{

adNum=n;

switch(adNum)

{

case 0:

{

window.img1.src="banners/1-2.gif";

window.img2.src="banners/2.gif";

window.img3.src="banners/3.gif";

window.img4.src="banners/4.gif";

window.img5.src="banners/5.gif";

break;

}

case 1:

{

window.img1.src="banners/1.gif";

window.img2.src="banners/2-2.gif";

window.img3.src="banners/3.gif";

window.img4.src="banners/4.gif";

window.img5.src="banners/5.gif";

break;

}

case 2:

{

window.img1.src="banners/1.gif";

window.img2.src="banners/2.gif";

window.img3.src="banners/3-2.gif";

window.img4.src="banners/4.gif";

window.img5.src="banners/5.gif";

break;

}

case 3:

{

window.img1.src="banners/1.gif";

window.img2.src="banners/2.gif";

window.img3.src="banners/3.gif";

window.img4.src="banners/4-2.gif";

window.img5.src="banners/5.gif";

break;

}

case 4:

{

window.img1.src="banners/1.gif";

window.img2.src="banners/2.gif";

window.img3.src="banners/3.gif";

window.img4.src="banners/4.gif";

window.img5.src="banners/5-2.gif";

break;

}

}

window.clearInterval(theTimer);

adNum=adNum-1;

nextAd();

}

//当点击时直接跳转

function nextAd(){

coll++;

if(coll>1)

{

switch(adNum+1)

{

case 5:

{

window.img1.src="banners/1-2.gif";

window.img2.src="banners/2.gif";

window.img3.src="banners/3.gif";

window.img4.src="banners/4.gif";

window.img5.src="banners/5.gif";

break;

}

case 1:

{

window.img1.src="banners/1.gif";

window.img2.src="banners/2-2.gif";

window.img3.src="banners/3.gif";

window.img4.src="banners/4.gif";

window.img5.src="banners/5.gif";

break;

}

case 2:

{

window.img1.src="banners/1.gif";

window.img2.src="banners/2.gif";

window.img3.src="banners/3-2.gif";

window.img4.src="banners/4.gif";

window.img5.src="banners/5.gif";

break;

}

case 3:

{

window.img1.src="banners/1.gif";

window.img2.src="banners/2.gif";

window.img3.src="banners/3.gif";

window.img4.src="banners/4-2.gif";

window.img5.src="banners/5.gif";

break;

}

case 4:

{

window.img1.src="banners/1.gif";

window.img2.src="banners/2.gif";

window.img3.src="banners/3.gif";

window.img4.src="banners/4.gif";

window.img5.src="banners/5-2.gif";

break;

}

}

}

if(adNum<cpAD.length-1)adNum++ ;

else adNum=0;

setTransition();

document.images.cpADrush.src=cpAD[adNum];

playTransition();

displayStatusMsg();

//定义了轮换时间 5s

theTimer=setTimeout("nextAd()", 5000);

}

function setTransition(){

if (document.all){

cpADrush.filters.revealTrans.Transition=23;

cpADrush.filters.revealTrans.apply();

}

}

function playTransition(){

if (document.all)

cpADrush.filters.revealTrans.play()

}

function displayStatusMsg() {

status=cpADmsg[adNum];

document.returnValue = true;

}

//结束

// -->

</script>

<table height="148" cellspacing="0" cellpadding="0">

<tr>

<td> <a href="javascript:jump2url()"> <img style="FILTER: revealTrans(duration=2,transition=23)" height="150" src width="575" border="0" name="cpADrush"></a></td>

<script language="JavaScript">nextAd()</script>

</tr>

<tr>

<td>

<table width="575" name="T1" id="T1" border="0" cellspacing="1" cellpadding="0">

<tr>

<td align="right"><img src="banners/dh_bg.gif" width="178" height="16"></td>

<td width="20"><a href="#" onMouseOver="changeimg(0)"><img name="Image2" id="img1" border="0" src="banners/1.gif" width="20" height="16" onClick="changeimg(0)"></a></td>

<td width="20"><a href="#" onMouseOver="changeimg(1)"><img name="Image3" id="img2" border="0" src="banners/2.gif" width="20" height="16" onClick="changeimg(1)"></a></td>

<td width="20"><a href="#" onMouseOver="changeimg(2)"><img name="Image4" id="img3" border="0" src="banners/3.gif" width="20" height="16" onClick="changeimg(2)"></a></td>

<td width="20"><a href="#" onMouseOver="changeimg(3)"><img name="Image5" id="img4" border="0" src="banners/4.gif" width="20" height="16" onClick="changeimg(3)"></a></td>

<td width="20"><a href="#" onMouseOver="changeimg(4)"><img name="Image6" id="img5" border="0" src="banners/5.gif" width="20" height="16" onClick="changeimg(4)"></a></td>

</tr>

</table>

</td>

</tr>

</table>