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) {

		nav_home_off		= newImage("/images/nav_home_off.gif");
		nav_vision_off		= newImage("/images/nav_vision_off.gif");
		nav_values_off		= newImage("/images/nav_values_off.gif");
		nav_services_off	= newImage("/images/nav_services_off.gif");
		nav_experience_off	= newImage("/images/nav_experience_off.gif");
		nav_results_off		= newImage("/images/nav_results_off.gif");
		nav_recruitment_off	= newImage("/images/nav_recruitment_off.gif");
		nav_contact_off		= newImage("/images/nav_contact_off.gif");
				
		nav_home_over		= newImage("/images/nav_home_over.gif");
		nav_vision_over		= newImage("/images/nav_vision_over.gif");
		nav_values_over		= newImage("/images/nav_values_over.gif");
		nav_services_over	= newImage("/images/nav_services_over.gif");
		nav_experience_over	= newImage("/images/nav_experience_over.gif");
		nav_results_over	= newImage("/images/nav_results_over.gif");
		nav_recruitment_over= newImage("/images/nav_recruitment_over.gif");
		nav_contact_over	= newImage("/images/nav_contact_over.gif");

		nav_home_on			= newImage("/images/nav_home_on.gif");
		nav_vision_on		= newImage("/images/nav_vision_on.gif");
		nav_values_on		= newImage("/images/nav_values_on.gif");
		nav_services_on		= newImage("/images/nav_services_on.gif");
		nav_experience_on	= newImage("/images/nav_experience_on.gif");
		nav_results_on		= newImage("/images/nav_results_on.gif");
		nav_recruitment_on	= newImage("/images/nav_recruitment_on.gif");
		nav_contact_on		= newImage("/images/nav_contact_on.gif");
		
		preloadFlag = true;

	}
}