buttonsOff = new Array()
	buttonsOn = new Array()
	
	imgFolder = "/images/"
	onPostFix = "-over"
	offPostFix = ""
	
	function flip(img)
	{
		if(img.src == buttonsOff[img.id].src)
			img.src = buttonsOn[img.id].src
		else
			img.src = buttonsOff[img.id].src
	}

	function flipOn(img)
	{
			img.src = buttonsOn[img.id].src
	}


	function flipOff(img)
	{
			img.src = buttonsOff[img.id].src
	}

	function addButton(img, ext)
	{
		buttonsOff[img] = new Image()
		buttonsOff[img].src = imgFolder + img + offPostFix + "." + ext
		
		buttonsOn[img] = new Image()
		buttonsOn[img].src = imgFolder + img + onPostFix + "." + ext
	}