var nav_img_root = '../img/nav';

var home = new Image();
home.src = nav_img_root + "/home_a.gif";

var homeoff = new Image();
homeoff.src = nav_img_root + "/home.gif";

var contact_us = new Image();
contact_us.src = nav_img_root + "/contact_us_a.gif";

var contact_usoff = new Image();
contact_usoff.src = nav_img_root + "/contact_us.gif";

var what = new Image();
what.src = nav_img_root + "/what_a.gif";

var whatoff = new Image();
whatoff.src = nav_img_root + "/what.gif";

var projects = new Image();
projects.src = nav_img_root + "/projects_a.gif";

var projectsoff = new Image();
projectsoff.src = nav_img_root + "/projects.gif";

var videos = new Image();
videos.src = nav_img_root + "/videos_a.gif";

var videosoff = new Image();
videosoff.src = nav_img_root + "/videos.gif";

var links = new Image();
links.src = nav_img_root + "/links_a.gif";

var linksoff = new Image();
linksoff.src = nav_img_root + "/links.gif";

var forum = new Image();
forum.src = nav_img_root + "/forum_a.gif";

var forumoff = new Image();
forumoff.src = nav_img_root + "/forum.gif";

function on(imgname, action)
{
	if(action)
	{
		eval ('document.'+imgname+'.src = '+imgname+'.src')
	}
	else
	{
		eval ('document.'+imgname+'.src = '+imgname+'off.src');
	}
}