//pre-load rollover images
var nav_about_on = new Image();
nav_about_on.src = "/images/nav_about_on.gif";
var nav_about_off = new Image();
nav_about_off.src = "/images/nav_about.gif";
var nav_custom_on = new Image();
nav_custom_on.src = "/images/nav_custom_on.gif";
var nav_custom_off = new Image();
nav_custom_off.src = "/images/nav_custom.gif";
var nav_lighting_on = new Image();
nav_lighting_on.src = "/images/nav_lighting_on.gif";
var nav_lighting_off = new Image();
nav_lighting_off.src = "/images/nav_lighting.gif";
var nav_bath_on = new Image();
nav_bath_on.src = "/images/nav_bath_on.gif";
var nav_bath_off = new Image();
nav_bath_off.src = "/images/nav_bath.gif";
var nav_showrooms_on = new Image();
nav_showrooms_on.src = "/images/nav_showrooms_on.gif";
var nav_showrooms_off = new Image();
nav_showrooms_off.src = "/images/nav_showrooms.gif";
var nav_contact_on = new Image();
nav_contact_on.src = "/images/nav_contact_on.gif";
var nav_contact_off = new Image();
nav_contact_off.src = "/images/nav_contact.gif";

function roll(ln, dir) {
	var name = ln.name.split('_')[1];
	var img = eval("document.nav_" + name + "_img");
	var src = eval("nav_" + name + "_" + dir);
	img.src = src.src;
}