private boolean parseGrid(Document doc)
	{
		NodeList nodes = doc.getElementsByTagName(XmlTag.GRID.toString());
		//only care about the first timer set (ignore all other timer elements)
		Element gridNode = (Element) nodes.item(0);
		String gridWidth= gridNode.getAttribute(XmlTag.WIDTH.toString());
		String gridHeight= gridNode.getAttribute(XmlTag.HEIGHT.toString());
		if(gridWidth !=null && gridHeight != null)
		{
			level.setLevelSize(Integer.parseInt(gridWidth), Integer.parseInt(gridHeight));
			return true;
		}
		return false;
	}