var menuImages;
	var index;
	var activeIndex = -1;
	var activeElement = "";
	menuImages = new Array();
	menuImages[0] = "Images/imgServOff.gif";
	menuImages[1] = "Images/imgServOn.gif";
	menuImages[2] = "Images/imgAboutOff.gif";
	menuImages[3] = "Images/imgAboutOn.gif";
	menuImages[4] = "Images/imgReqOff.gif";
	menuImages[5] = "Images/imgReqOn.gif";
	menuImages[6] = "Images/imgConOff.gif";
	menuImages[7] = "Images/imgConOn.gif";
	
	menuOptions = new Array();
	menuOptions[0] = "dServices";
	menuOptions[1] = "dAbout";
	menuOptions[2] = "dRequest";
	menuOptions[3] = "dContact";
	
	function showMenu(id)
	{
		for(x=0; x < menuOptions.length;x++)
		{
			if (x == id)
			{
				index = x;
			}
			else
			{
				document.getElementById(menuOptions[x]).style.display = "none";
			}
		}
		document.getElementById(menuOptions[index]).style.display = "block";
	}
	
	function showSubMenu(id,index,option)
	{
		if (activeIndex == -1)
		{
			showElement(id,index);
			showMenu(option)
		}
		else
		{
			hideElement();
			showElement(id,index);
			showMenu(option);
		}
	}
	
	function showElement(id,index)
	{
		var element;
		element = document.getElementById(id);
		element.src = menuImages[index + 1];
		activeIndex = index + 1;
		activeElement = id;
	}
	
	function hideElement()
	{
		var element;
		element = document.getElementById(activeElement);
		element.src = menuImages[activeIndex - 1];
	}