var imageDir = "images/slides/";
var imageNum = 1;
var currentImage = new Image();
currentImage.src = imageDir+imageNum+".jpg";

function startShow() 
{
// Time is in seconds X 1000
setInterval("slideShow()", 3000);
}
function slideShow() 
{
imageNum++;
if (imageNum == 15) 
{
imageNum = 1;
}
currentImage.src = imageDir+imageNum+".jpg";
document["slideImg"].src = currentImage.src;
}