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

function changeImages() {
  if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		btn_home_ = newImage("/img/btn_home_.gif");
		btn_contact_us_ = newImage("/img/btn_contact_us_.gif");
		nav_legislation_ = newImage("/img/nav_legislation_.gif");
		nav_services_ = newImage("/img/nav_services_.gif");
		nav_projects_ = newImage("/img/nav_projects_.gif");
		nav_people_ = newImage("/img/nav_people_.gif");
		nav_downloads_ = newImage("/img/nav_downloads_.gif");
		nav_publications_ = newImage("/img/nav_publications_.gif");
		nav_compliance_ = newImage("/img/nav_compliance_.gif");
		preloadFlag = true;
	}
}

function preloadcareersImages() {
	if (document.images) {
		nav_lft_current_openings_ = newImage("/img/careers/nav_lft_current_openings.gif");
		nav_lft_qualifications_ = newImage("/img/careers/nav_lft_qualifications.gif");
		nav_lft_benefits_ = newImage("/img/careers/nav_lft_benefits.gif");
		preloadFlag = true;
	}
}