var imageIndex = 0;
var images = new Array()
var visibleScreen = 1;

function bodyLoad() {
numImages = 10;
for (i = 0; i < numImages; ++i) {
	images[i] = new Image();
	images[i].src = "Picture" + (i + 1) + ".jpg";
}
setTimeout(swapImage, 2000);
}

function swapImage() {
	++imageIndex;
	if (imageIndex >= numImages) {
		imageIndex = 0;
	}
	if (visibleScreen == 1) {
		document.getElementById('screen2').src = images[imageIndex].src;
		$('#screen').fadeOut(400);
		visibleScreen = 2;
	}
	else {
		document.getElementById('screen').src = images[imageIndex].src;
		$('#screen').fadeIn(400);
		visibleScreen = 1;
	}
	setTimeout(swapImage, 2000);
}