////change number of images below 
var number_of_images=2
//change speed below (in seconds)
var speed=1
var step=1
var whichimage=1

function slideit(){
if (!document.images)
return

if (document.all){
//²¥·Å
intr1.filters.item(0).Apply();
intr2.filters.item(0).Apply();
intr3.filters.item(0).Apply();

document.images.intr1.src="images/1-"+step+".jpg";
document.images.intr2.src="images/2-"+step+".jpg";
document.images.intr3.src="images/3-"+step+".jpg";

intr1.filters.item(0).Play();
intr2.filters.item(0).Play();
intr3.filters.item(0).Play();

}


if (document.all)
whichimage=step
if (step<number_of_images)
step++
else
step=1
if (document.all)
setTimeout("slideit()",speed*1000+3000)
else
setTimeout("slideit()",speed*1000)
}