function galleryShow(i) {
	document['galleryImg'].src = imgArray[i];
}

function galleryPrevious() {
	if (galleryIndex == 0) { galleryIndex = imgCount; }
	galleryIndex -= 1;
	galleryShow(galleryIndex);
	galleryAuto = false;
}

function galleryNext() {
	galleryIndex = (galleryIndex + 1) % imgCount;
	galleryShow(galleryIndex);
	galleryAuto = false;
}

function galleryAutoNext() {
	if (galleryAuto) {
		galleryIndex = (galleryIndex + 1) % imgCount;
		galleryShow(galleryIndex);
		setTimeout(galleryAutoNext, galleryInterval);
	}
}

function galleryAdd(n) {
	imgArray[imgCount++] = "gallery/" + n + ".png";
}

var galleryInterval = 4000;
var galleryAuto = true;
var galleryIndex = 0;
var imgArray = new Array();
var imgCount = 0;

galleryAdd('nyc-today');
galleryAdd('nyc-past');
galleryAdd('options');
galleryAdd('options-reset-fare');
galleryAdd('options');
galleryAdd('options-reset-ride');
galleryAdd('options-down');

galleryAdd('sf-city');
galleryAdd('sf-today');
galleryAdd('sf-past');

galleryAdd('atlanta-city');
galleryAdd('atlanta-today');
galleryAdd('atlanta-past');

galleryAdd('about');
galleryAdd('nyc-city');
galleryAdd('options-city-change');

setTimeout(galleryAutoNext, galleryInterval);