if (document.images) {
	var homeoff = new Image(); // for the inactive image
	homeoff.src = "images/home_nav_off.gif";
	var homeon = new Image(); // for the active image
	homeon.src = "images/home_nav_on.gif";
	var personaloff = new Image();
	personaloff.src = "images/personal_protection_nav_off.gif";
	var personalon = new Image();
	personalon.src = "images/personal_protection_nav_on.gif";
	var surveillanceoff = new Image();
	surveillanceoff.src = "images/surveillance_nav_off.gif";
	var surveillanceon = new Image();
	surveillanceon.src = "images/surveillance_nav_on.gif";
	var civildemandoff = new Image();
	civildemandoff.src = "images/civildemand_nav_off.gif";
	var civildemandon = new Image();
	civildemandon.src = "images/civildemand_nav_on.gif";
	var retailoff = new Image();
	retailoff.src = "images/retail_nav_off.gif";
	var retailon = new Image();
	retailon.src = "images/retail_nav_on.gif";
	var aboutusoff = new Image();
	aboutusoff.src = "images/aboutus_nav_off.gif";
	var aboutuson = new Image();
	aboutuson.src = "images/aboutus_nav_on.gif";
	var subabuseoff = new Image();
	subabuseoff.src = "images/subabuse_nav_off.gif";
	var subabuseon = new Image();
	subabuseon.src = "images/subabuse_nav_on.gif";
	var securityoff = new Image();
	securityoff.src = "images/security_nav_off.gif";
	var securityon = new Image();
	securityon.src = "images/security_nav_on.gif";
	var pressroomoff = new Image();
	pressroomoff.src = "images/pressroom_nav_off.gif";
	var pressroomon = new Image();
	pressroomon.src = "images/pressroom_nav_on.gif";
	var espionageoff = new Image();
	espionageoff.src = "images/espionage_nav_off.gif";
	var espionageon = new Image();
	espionageon.src = "images/espionage_nav_on.gif";
	var fireguardoff = new Image();
	fireguardoff.src = "images/fireguard_nav_off.gif";
	var fireguardon = new Image();
	fireguardon.src = "images/fireguard_nav_on.gif";
	var linksoff = new Image();
	linksoff.src = "images/links_nav_off.gif";
	var linkson = new Image();
	linkson.src = "images/links_nav_on.gif";
	var contactusoff = new Image();
	contactusoff.src = "images/contactus_nav_off.gif";
	var contactuson = new Image();
	contactuson.src = "images/contactus_nav_on.gif";
}

function act(imgName) {
  if (document.images)
    document.images[imgName].src = eval(imgName + "on.src");
}
function inact(imgName) {
  if (document.images)
    document.images[imgName].src = eval(imgName + "off.src");
}