var iDelay = 6000;
var iIndex = 0;

var sImages = new Array( );

sImages[0] = "sealcoating/products1.jpg";
sImages[1] = "sealcoating/products2.jpg";
sImages[2] = "sealcoating/products3.jpg";
sImages[3] = "sealcoating/products4.jpg";

var sPreloadImages = new Array();

for (n = 0; n < sImages.length; n ++)
{
	sPreloadImages[n] = new Image()
	sPreloadImages[n].src = sImages[n]
}

function changeImage( )
{
	iIndex ++;

	if (iIndex == sImages.length)
		iIndex = 0;

	document.images.product.src = sImages[iIndex];
}

setInterval("changeImage( )", iDelay);