/******************************************************************************
 * Copyright (c) 2007 De Cecco Simone.
 * All rights reserved.
 * www.simonedececco.it
 *****************************************************************************/

var arrImageSources = [];
var arrImageDescriptions = [];
var imageIndex = 0;

function AddImage(source, description) {
	arrImageSources[ arrImageSources.length ] = source;
	arrImageDescriptions[ arrImageDescriptions.length ] = description;
}

function LoadImage(direction) {
/*
	imageIndex += direction;
	if (imageIndex < 0)
		imageIndex += arrImageSources.length
	else if (imageIndex > arrImageSources.length)
		imageIndex = imageIndex % arrImageSources.length
*/

	imageIndex = (imageIndex + direction + arrImageSources.length) % arrImageSources.length
	document.images['image_source'].src = arrImageSources[ imageIndex ];
	document.getElementById('image_description').innerHTML = arrImageDescriptions[ imageIndex ];
}