/*
 * This script and many more are available free online at
 * The JavaScript Source!! http://javascript.internet.com
 */

function changeImage()
{
	if(typeof mainimage != 'undefined')
		mainimage.src = list.options[list.selectedIndex].value;
}

function prevImage()
{
	if(list.selectedIndex == 0)
		list.selectedIndex = list.options.length-1;
	else
		list.selectedIndex--;
	changeImage();
}

function nextImage()
{
	if(list.selectedIndex == list.options.length-1)
		list.selectedIndex = 0;
	else
		list.selectedIndex++;
	changeImage();
}

window.onload = function() { changeImage() };