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) {
		kc_03_over = newImage("nav/kc_03-over.gif");
		kc_04_over = newImage("nav/kc_04-over.gif");
		kc_05_over = newImage("nav/kc_05-over.gif");
		kc_06_over = newImage("nav/kc_06-over.gif");
		kc_07_over = newImage("nav/kc_07-over.gif");
		kc_12_over = newImage("nav/kc_12-over.gif");
		kc_13_over = newImage("nav/kc_13-over.gif");
		kc_14_over = newImage("nav/kc_14-over.gif");
		preloadFlag = true;
	}
}