var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		pre_availability_over = newImage('images/header/availability-over.gif');
		pre_company_over = newImage('images/header/company-over.gif');
		pre_distribution_over = newImage('images/header/distribution-over.gif');
		pre_warehouse_over = newImage('images/header/warehouse-over.gif');
		pre_brokerage_over = newImage('images/header/brokerage-over.gif');
		pre_edi_over = newImage('images/header/edi-over.gif');
		pre_customeraccess_over = newImage('images/header/customeraccess-over.gif');
		pre_home_over = newImage('images/header/home-over.gif');
		preloadFlag = true;
	}
}