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

var defImg = "";

function changeImages() {
	if (document.images && (preloadFlag == true)) {

		if (changeImages.arguments[0] != defImg) {
			
			for (var i=0; i<changeImages.arguments.length; i+=3) {
				document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
			}
		}

		if (changeImages.arguments.length == 3) {
			defImg = changeImages.arguments[2];
		}

	}
}

var preloadFlag = false;
function preloadImages() {
if (document.images) {
navPressCenter_over = newImage("images/navPressCenter-over.gif");
navContactUs_over = newImage("images/navContactUs-over.gif");
navRequestBrochure_over = newImage("images/navRequestBrochure-over.gif");
navVisitCHS_over = newImage("images/navVisitCHS-over.gif");

navWhyCyberKnife_over = newImage("images/navWhyCyberKnife-over.gif");
navWhoCanBenefit_over = newImage("images/navWhoCanBenefit-over.gif");
navAboutCenter_over = newImage("images/navAboutCenter-over.gif");
navOurTeam_over = newImage("images/navOurTeam-over.gif");
navAboutCHS_over = newImage("images/navAboutCHS-over.gif");

navWhy01_over = newImage("images/navWhy01-over.gif");
navWhy02_over = newImage("images/navWhy02-over.gif");
navWhy03_over = newImage("images/navWhy03-over.gif");
navWhy04_over = newImage("images/navWhy04-over.gif");
navWhy05_over = newImage("images/navWhy05-over.gif");
navWhy06_over = newImage("images/navWhy06-over.gif");

navAboutCenter01_over = newImage("images/navAboutCenter01-over.gif");
navAboutCenter02_over = newImage("images/navAboutCenter02-over.gif");
navAboutCenter03_over = newImage("images/navAboutCenter03-over.gif");
navAboutCenter04_over = newImage("images/navAboutCenter04-over.gif");
navAboutCenter04_over = newImage("images/navAboutCenter05-over.gif");
navAboutCenter04_over = newImage("images/navAboutCenter06-over.gif");

navOurTeam01_over = newImage("images/navOurTeam01-over.gif");
navOurTeam02_over = newImage("images/navOurTeam02-over.gif");
navOurTeam03_over = newImage("images/navOurTeam03-over.gif");
navOurTeam04_over = newImage("images/navOurTeam04-over.gif");

navAboutCHS01_over = newImage("images/navAboutCHS01-over.gif");
navAboutCHS02_over = newImage("images/navAboutCHS02-over.gif");
navAboutCHS03_over = newImage("images/navAboutCHS03-over.gif");
navAboutCHS04_over = newImage("images/navAboutCHS04-over.gif");
navAboutCHS05_over = newImage("images/navAboutCHS05-over.gif");

navFRP01_over = newImage("images/navFRP01-over.gif");
navFRP02_over = newImage("images/navFRP02-over.gif");
navFRP03_over = newImage("images/navFRP03-over.gif");
navFRP04_over = newImage("images/navFRP04-over.gif");

preloadFlag = true;
}
}