if (document.images) {
	buttonA = new Image
	buttonB = new Image
	buttonC = new Image
	buttonD = new Image
	buttonE = new Image
	buttonF = new Image
	buttonG = new Image
	buttonH = new Image
	buttonI = new Image
	buttonJ = new Image
	buttonK = new Image
	buttonL = new Image
	buttonM = new Image
	buttonN = new Image

	buttonA.src = "images/nav1.gif"
	buttonB.src = "images/nav1on.gif"
	buttonC.src = "images/nav2.gif"
	buttonD.src = "images/nav2on.gif"
	buttonE.src = "images/nav3.gif"
	buttonF.src = "images/nav3on.gif"
	buttonG.src = "images/nav4.gif"
	buttonH.src = "images/nav4on.gif"
	buttonI.src = "images/nav5.gif"
	buttonJ.src = "images/nav5on.gif"
	buttonK.src = "images/nav6.gif"
	buttonL.src = "images/nav6on.gif"
	buttonM.src = "images/nav7.gif"
	buttonN.src = "images/nav7on.gif"
	}
	else {
	buttonA = ""
	buttonB = ""
	buttonC = ""
	buttonD = ""
	buttonE = ""
	buttonF = ""
	buttonG = ""
	buttonH = ""
	buttonI = ""
	buttonJ = ""
	buttonK = ""
	buttonL = ""
	buttonM = ""
	buttonN = ""

	document.button = ""
	document.button2 = ""
	document.button3 = ""
	document.button4 = ""
	document.button5 = ""
	document.button6 = ""
	document.button7 = ""
	document.button8 = ""
	document.button9 = ""
	document.button10 = ""
	document.button11 = ""
	document.button12 = ""
	document.button13 = ""
	document.button14 = ""
	}