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) {
		banner_03_over = newImage("images/nav_about_roll.jpg");
		banner_09_over = newImage("images/nav_team_roll.jpg");
		banner_02_over = newImage("images/nav_contact_roll.jpg");
		banner_04_over = newImage("images/nav_corporate_roll.jpg");
		banner_07_over = newImage("images/nav_career_roll.jpg");
		banner_05_over = newImage("images/nav_home_roll.jpg");
		bottom_23_over = newImage("images/bottom_23-over.jpg");
		bottom_24_over = newImage("images/bottom_24-over.jpg");
		bottom_25_over = newImage("images/bottom_25-over.jpg");
		bottom_26_over = newImage("images/bottom_26-over.jpg");
		preloadFlag = true;
	}
}