function showSpoiler(obj)
{
	var inner = obj.parentNode.parentNode.getElementsByTagName("div")[0];
	if (inner.style.display == "none")
	{
		inner.style.display = "";
		obj.style.background="url(images/arrow-up.png) no-repeat";
	}
	else
	{
		inner.style.display = "none";
		obj.style.background=" url(images/arrow-down.png) no-repeat";
	}
}
function hideSpoiler(obj)
{
	var inner = obj.parentNode.getElementsByTagName("div")[0];
	if (inner.style.display == "")
	{
		inner.style.display = "none";
		obj.style.background=" url(bgdesert.jpg) repeat-y";
	}
	else
	{
		inner.style.display = "";
		obj.style.background=" url(bgdesert.jpg) repeat-y";
	}
}