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

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

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		navig_02_over = newImage("images/navig-02-over.gif");
		navig_03_over = newImage("images/navig-03-over.gif");
		navig_04_over = newImage("images/navig-04-over.gif");
        navigx_03_over = newImage("images/navigx-03-over.gif");
		navigx_04_over = newImage("images/navigx-04-over.gif");
		navig_05_over = newImage("images/navig-05-over.gif");
		navig_06_over = newImage("images/navig-06-over.gif");
		navig_07_over = newImage("images/navig-07-over.gif");
		navig_08_over = newImage("images/navig-08-over.gif");
		navig_09_over = newImage("images/navig-09-over.gif");
		navig_10_over = newImage("images/navig-10-over.gif");
		navig_11_over = newImage("images/navig-11-over.gif");
		preloadFlag = true;
	}
}