function swapOn(what){
	var newImage = "images/graphics/" + what + ".gif";
	document.getElementById('chart').src = newImage;
	}

function swapOff(){
	document.getElementById('chart').src = "images/graphics/NPV.gif";
	}
	

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

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		NPV_IDA1 = newImage("images/graphics/NPV-IDA1.gif");
		NPV_IDA2 = newImage("images/graphics/NPV-IDA2.gif");
		NPV_trad1 = newImage("images/graphics/NPV-trad1.gif");
		NPV_trad2 = newImage("images/graphics/NPV-trad2.gif");
		nav_japan_ON = newImage("images/nav-japan-ON.gif");
		nav_pardigms_ON = newImage("images/nav-paradigms-ON.gif");
		nav_services_ON = newImage("images/nav-services-ON.gif");
		nav_about_ON = newImage("images/nav-about-ON.gif");
		nav_partnerships_ON = newImage("images/nav-partnerships-ON.gif");
		nav_news_ON = newImage("images/nav-news-ON.gif");
		nav_jobs_ON = newImage("images/nav-jobs-ON.gif");
		nav_contact_ON = newImage("images/nav-contact-ON.gif");
		nav2_japan_ON = newImage("images/nav2-japan-ON.gif");
		nav2_pardigms_ON = newImage("images/nav2-paradigms-ON.gif");
		nav2_services_ON = newImage("images/nav2-services-ON.gif");
		nav2_about_ON = newImage("images/nav2-about-ON.gif");
		nav2_partnerships_ON = newImage("images/nav2-partnerships-ON.gif");
		nav2_news_ON = newImage("images/nav2-news-ON.gif");
		nav2_jobs_ON = newImage("images/nav2-jobs-ON.gif");
		nav2_contact_ON = newImage("images/nav2-contact-ON.gif");
		preloadFlag = true;
	}
}


function navOn(theImage){
	var activeImage = "images/nav2-" + theImage + "-ON.gif";
	document.getElementById(theImage).src = activeImage;
	}

function navOff(theImage){
	var activeImage = "images/nav2-" + theImage + ".gif";
	document.getElementById(theImage).src = activeImage;
	}
	
	
function navHomeOn(theImage){
	var activeImage = "images/nav-" + theImage + "-ON.gif";
	document.getElementById(theImage).src = activeImage;
	}

function navHomeOff(theImage){
	var activeImage = "images/nav-" + theImage + ".gif";
	document.getElementById(theImage).src = activeImage;
	}