function newImage(arg) {
	if (document.images) { rslt = new Image(); rslt.src = arg; return rslt; }
}

function changeImages() {
	if (document.images) { for (var i=0; i<changeImages.arguments.length; i+=2) { document[changeImages.arguments[i]].src = changeImages.arguments[i+1]; } }
}

function preloadImages() {
	if (document.images) {
		nv_01_01_o = newImage("/images/nav/01.on.01.gif");
		nv_01_02_o = newImage("/images/nav/01.on.02.gif");
		nv_01_03_o = newImage("/images/nav/01.on.03.gif");
		nv_01_04_o = newImage("/images/nav/01.on.04.gif");
		nv_01_05_o = newImage("/images/nav/01.on.05.gif");
		nv_02_01_o = newImage("/images/nav/nv.02.01_o.gif");
		nv_02_02_o = newImage("/images/nav/nv.02.02_o.gif");
		nv_02_03_o = newImage("/images/nav/nv.02.03_o.gif");
		nv_02_04_o = newImage("/images/nav/nv.02.04_o.gif");
	}
}