if (document.images) {
	nav1on = new Image
	nav1off = new Image
	nav2on = new Image
	nav2off = new Image
	nav3on = new Image
	nav3off = new Image
	nav4on = new Image
	nav4off = new Image
	nav5on = new Image
	nav5off = new Image
	nav6on = new Image
	nav6off = new Image

	nav1on.src = "layout/21-on.png"
	nav1off.src = "layout/21-off.png"
	nav2on.src = "layout/22-on.png"
	nav2off.src = "layout/22-off.png"
	nav3on.src = "layout/23-on.png"
	nav3off.src = "layout/23-off.png"
	nav4on.src = "layout/24-on.png"
	nav4off.src = "layout/24-off.png"
	nav5on.src = "layout/25-on.png"
	nav5off.src = "layout/25-off.png"
	nav6on.src = "layout/26-on.png"
	nav6off.src = "layout/26-off.png"
}
else {
	nav1on.src = ""
	nav1off.src = ""
	nav2on.src = ""
	nav2off.src = ""
	nav3on.src = ""
	nav3off.src = ""
	nav4on.src = ""
	nav4off.src = ""
	nav5on.src = ""
	nav5off.src = ""
	nav6on.src = ""
	nav6off.src = ""
		
	document.nav1 = ""
	document.nav2 = ""
	document.nav3 = ""
	document.nav4 = ""
	document.nav5 = ""
	document.nav6 = ""
}