function rotateFeatureImage()
{
	var featureImage = document.getElementById("feature_image");
	var current;
	var next;
	
	if (featureImage.currentStyle)
	{
		current = featureImage.currentStyle.backgroundImage;
	}
	else
	{
		if (document.defaultView)
		{
			var computedStyle = document.defaultView.getComputedStyle(featureImage, "");
			current = computedStyle.getPropertyValue("background-image");
		}
	}
	
	next = getNextImageFromCurrent(current);
	if (next)
	{
		featureImage.style.backgroundImage = next;
	}
}

function getNextImageFromCurrent(currentObj)
{
	var current = currentObj.toString();
	var next;
	
	if (current.indexOf("tns_intro_banner.jpg", 0) > 0)
	{
		next = current.replace("tns_intro_banner.jpg", "bathspa.jpg");
	}
	else if (current.indexOf("bathspa.jpg", 0) > 0)
	{
		next = current.replace("bathspa.jpg", "londonmet.jpg");
	}
	else if (current.indexOf("londonmet.jpg", 0) > 0)
	{
		next = current.replace("londonmet.jpg", "tns_intro_banner.jpg");
	}
	
	return null;
	// return next;
}