var index=0;
var images = new Array();
function moveBy(amount)
{
	var oldIndex = index;
	var d = document.getElementById("divImage");
	index += amount;
	if (index < 0)
		index += images.length;
	else if (index >= images.length)
		index -= images.length;
	if (index != oldIndex)
	{
		d.src = images[index].src;

		if (index == 0)
		{
			d = document.getElementById("prevLnk");
			d.style.visibility = "hidden";
		}
		else if (oldIndex == 0)
		{
			d = document.getElementById("prevLnk");
			d.style.visibility = "visible";
		}
		var lst = images.length-1;
		if (index == lst)
		{
			d = document.getElementById("nextLnk");
			d.style.visibility = "hidden";
		}
		else if (oldIndex == lst)
		{
			d = document.getElementById("nextLnk");
			d.style.visibility = "visible";
		}
	}
}

function preload(img)
{
	var i = new Image();
	i.src = img;
}

function initImages(name, max)
{
	var i= 1;
	var img;
	for (;i<max;i++)
	{
		img = new Image();
		img.src = name+i+".jpg";
		images.push(img);
	}
}