if (document.images) {
	var homeHi = new Image();
	homeHi.src = "images/shared/nav/home_hi.gif";
	var homeLo = new Image();
	homeLo.src = "images/shared/nav/home_lo.gif";

	var aboutHi = new Image();
	aboutHi.src = "images/shared/nav/about_hi.gif";
	var aboutLo = new Image();
	aboutLo.src = "images/shared/nav/about_lo.gif";

	var currentHi = new Image();
	currentHi.src = "images/shared/nav/current_hi.gif";
	var currentLo = new Image();
	currentLo.src = "images/shared/nav/current_lo.gif";

	var futureHi = new Image();
	futureHi.src = "images/shared/nav/future_hi.gif";
	var futureLo = new Image();
	futureLo.src = "images/shared/nav/future_lo.gif";

	var contactHi = new Image();
	contactHi.src = "images/shared/nav/contact_hi.gif";
	var contactLo = new Image();
	contactLo.src = "images/shared/nav/contact_lo.gif";
}
	
function ImageRollOver(imgName) {
	if (document.images){
		document[imgName].src=eval(imgName+"Hi.src");
	}
}
	
function ImageRollOut(imgName) {
	if (document.images){
		document[imgName].src=eval(imgName+"Lo.src");
	}
}