var current = 0;
var images;
var imageID;
var period = 3000;

function SwapImages()
{
	current = current + 1;
	if (current >= images.length)
	{
		current = 0;
	}
	document.getElementById(imageID).src = images[current];
	
	t = setTimeout("SwapImages()", period);
}

function PreLoadImages()
{
	//from http://articles.techrepublic.com.com/5100-22-5214317.html
	var i;
	var tempImage;
	for (i = 0; i < images.length; i++)
	{
		tempImage = new Image;
		tempImage.src = images[i];
	}
}