var ii = 1;
function set_img(idx) {
	if (idx == 'n') {
		if (ii < 10 && ii >= 1) ii++ ;
	} else if (idx == 'p') {
		if (ii <= 10 && ii > 1) ii-- ;
	} else {
		ii = idx;
	}
	document.images['ScreenShot'].src = "imgs/screenshots/" + ii + ".jpg"
	return 0;
}