var aryImages = new Array(13);
aryImages[0] = "gallery/0.jpg";
aryImages[1] = "gallery/1.jpg";
aryImages[2] = "gallery/2.jpg";
aryImages[3] = "gallery/3.jpg";
aryImages[4] = "gallery/4.jpg";
aryImages[5] = "gallery/5.jpg";
aryImages[6] = "gallery/6.jpg";
aryImages[7] = "gallery/7.jpg";
aryImages[8] = "gallery/8.jpg";
aryImages[9] = "gallery/9.jpg";
aryImages[10] = "gallery/10.jpg";
aryImages[11] = "gallery/11.jpg";
aryImages[12] = "gallery/12.jpg";

for (i=0; i < aryImages.length; i++)
{
	var preload = new Image();
	preload.src = aryImages[i];
}

function swap(imgIndex)
{
	document['imgMain'].src = aryImages[imgIndex];
}