var image_current = 0;

function image_next()
{
	image_current++;

	if (image_current > image_array.length-1)
	{
		image_current = 0;
	}

	image_set(image_current);
}

function image_prev()
{
	image_current--;

	if (image_current < 0)
	{
		image_current = image_array.length-1;
	}

	image_set(image_current);
}

function image_set(id)
{
	document.getElementById("retrolabel").innerHTML = '<p>'+image_labels[id]+'</p>';	
	document.getElementById("retroimage").src = image_array[id];
	document.getElementById("retrolink").href = image_array[id];
}