var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		pre_logo_int_over = newImage('images/logo_int_over.gif');
		pre_nav_s_bio_over = newImage('images/nav_s_bio_over.gif');
		pre_nav_s_phi_over = newImage('images/nav_s_phi_over.gif');
		pre_nav_s_arch_over = newImage('images/nav_s_arch_over.gif');
		pre_nav_s_corp_over = newImage('images/nav_s_corp_over.gif');
		pre_nav_s_comm_over = newImage('images/nav_s_comm_over.gif');
		pre_nav_s_int_over = newImage('images/nav_s_int_over.gif');
		pre_nav_s_pers_over = newImage('images/nav_s_pers_over.gif');
		pre_nav_s_stud_over = newImage('images/nav_s_stud_over.gif');
		pre_nav_s_mdl_over = newImage('images/nav_s_mdl_over.gif');
		pre_nav_s_pubs_over = newImage('images/nav_s_pubs_over.gif');
		pre_nav_s_cont_over = newImage('images/nav_s_cont_over.gif');
		pre_nav_s_cli_over = newImage('images/nav_s_cli_over.gif');
		preloadFlag = true;
	}
}