var menuHovered = null;

function menuMouseOver(e)
{
	var src;

	if (window.event)
	{
		src = event.srcElement;
	}
	else
	{
		src = e.target;
	}

	var parentSrc = src.parentNode;

	if (src.className.indexOf("menuItem") == 0 && src.className != "menuItemSelected")
	{
		if(menuHovered)
		{
			menuHovered.className = "menuItemNormal";
		}

		src.className = "menuItemHover";
		menuHovered = src;
	}
	else if (parentSrc.className && parentSrc.className.indexOf("menuItem") == 0 && parentSrc.className != "menuItemSelected")
	{
		if(menuHovered)
		{
			menuHovered.className = "menuItemNormal";
		}

		parentSrc.className = "menuItemHover";
		menuHovered = parentSrc;
	}
	else if (menuHovered)
	{					
		menuHovered.className = "menuItemNormal";
		menuHovered = null;
	}
}

function changeChapter(newChapter)
{
    window.location.href = location.pathname + "?chapter=" + newChapter;
}

function init()
{
	document.onmouseover = menuMouseOver;
}