if (document.images) {
		n1a = new Image
		n1b = new Image
		n2a = new Image
		n2b = new Image
		n3a = new Image
		n3b = new Image
		n4a = new Image
		n4b = new Image
		n5a = new Image
		n5b = new Image
		n6a = new Image
		n6b = new Image

		n1a.src = "images/n1a.gif"
		n1b.src = "images/n1b.gif"
		n2a.src = "images/n2a.gif"
		n2b.src = "images/n2b.gif"
		n3a.src = "images/n3a.gif"
		n3b.src = "images/n3b.gif"
		n4a.src = "images/n4a.gif"
		n4b.src = "images/n4b.gif"
		n5a.src = "images/n5a.gif"
		n5b.src = "images/n5b.gif"
		n6a.src = "images/n6a.gif"
		n6b.src = "images/n6b.gif"
	}
	else {
		n1a = ""
		n1b = ""
		document.n1 = ""
		n2a = ""
		n2b = ""
		document.n2 = ""
		n3a = ""
		n3b = ""
		document.n3 = ""
		n4a = ""
		n4b = ""
		document.n4 = ""
		n5a = ""
		n5b = ""
		document.n5 = ""
		n6a = ""
		n6b = ""
		document.n6 = ""
	}