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 = true;
function preloadImages() {
	if (document.images) {
	 	nav02_over = newImage("../images/vinav2009holon_02.jpg");
	 	nav03_over = newImage("../images/vinav2009holon_03.jpg");
	 	nav04_over = newImage("../images/vinav2009holon_04.jpg");
	 	nav05_over = newImage("../images/vinav2009holon_05.jpg");
	 	nav06_over = newImage("../images/vinav2009holon_06.jpg");
	 	nav07_over = newImage("../images/vinav2009holon_07.jpg");
	 	nav08_over = newImage("../images/vinav2009holon_08.jpg");
	 	nav09_over = newImage("../images/vinav2009holon_09.jpg");
		preloadFlag = true;
	}
}