var class1='pagebg'

var class2='pagebg1'

var class3='pagebg2'

//variable that will increment through the images
var step=1
function slideit(){
//if browser does not support the image object, exit.
//if (!document.slideshow.className)
//return
slideshow.className = eval("class"+step)
if (step<3)
step++
else
step=1
//call function "slideit()" every 2.5 seconds
setTimeout("slideit()",2500)
}
slideit();
//slideshow.className = class2;