var pathToImages = "/disks/images/";

var nav_home_on = new Image();
nav_home_on.src = pathToImages + "nav_home_on.gif";
var nav_home_off = new Image();
nav_home_off.src = pathToImages + "nav_home_off.gif";

var nav_whatsnew_on = new Image();
nav_whatsnew_on.src = pathToImages + "nav_whatsnew_on.gif";
var nav_whatsnew_off = new Image();
nav_whatsnew_off.src = pathToImages + "nav_whatsnew_off.gif";

var nav_technology_on = new Image();
nav_technology_on.src = pathToImages + "nav_technology_on.gif";
var nav_technology_off = new Image();
nav_technology_off.src = pathToImages + "nav_technology_off.gif";

var nav_products_on = new Image();
nav_products_on.src = pathToImages + "nav_products_on.gif";
var nav_products_off = new Image();
nav_products_off.src = pathToImages + "nav_products_off.gif";

var nav_support_on = new Image();
nav_support_on.src = pathToImages + "nav_support_on.gif";
var nav_support_off = new Image();
nav_support_off.src = pathToImages + "nav_support_off.gif";

function rollOn(imgID)
{
	var s = pathToImages + imgID + "_on.gif";
	document.getElementById(imgID).src = s;
}

function rollOff(imgID)
{
	var s = pathToImages + imgID + "_off.gif";
	document.getElementById(imgID).src = s;
}