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) {
		header_gallery_over = newImage("images/header_gallery-over.gif");
		header_soldiers_over = newImage("images/header_soldiers-over.gif");
		header_share_over = newImage("images/header_share-over.gif");
		header_reminder_over = newImage("images/header_reminder-over.gif");
		header_about_over = newImage("images/header_about-over.gif");
		header_assistance_over = newImage("images/header_assistance-over.gif");
		preloadFlag = true;
	}
}