if(document.images) {
	
	acad_inst = new Image;
	acad_inst.src = "/images/nav/n2-acad-inst.gif";
	
	acad_inst_over = new Image;
	acad_inst_over.src = "/images/nav/n2-acad-inst-over.gif";
	
	museums = new Image;
	museums.src = "/images/nav/n2-museums.gif";
	
	museums_over = new Image;
	museums_over.src = "/images/nav/n2-museums-over.gif";
	
	state_reg = new Image;
	state_reg.src = "/images/nav/n2-state-reg.gif";
	
	state_reg_over = new Image;
	state_reg_over.src = "/images/nav/n2-state-reg-over.gif";
	
	laser2 = new Image;
	laser2.src = "/images/nav/n3-laser.gif";
	
	laser2_over = new Image;
	laser2_over.src = "/images/nav/n3-laser-over.gif";

	corps_found = new Image;
	corps_found.src = "/images/nav/n2-corps-found.gif";
	
	corps_found_over = new Image;
	corps_found_over.src = "/images/nav/n2-corps-found-over.gif";

	contact = new Image;
	contact.src = "/images/nav/n2-contact.gif";
	
	contact_over = new Image;
	contact_over.src = "/images/nav/n2-contact-over.gif"; 
	
// tertiary navigation

	nsrc_corp_part = new Image;
	nsrc_corp_part.src = "/images/nav/n3-nsrc-corp-part.gif";
		
	nsrc_corp_part_over = new Image;
	nsrc_corp_part_over.src = "/images/nav/n3-nsrc-corp-part-over.gif";
	
	corp_coal = new Image;
	corp_coal.src = "/images/nav/n3-corp-coal.gif";
		
	corp_coal_over = new Image;
	corp_coal_over.src = "/images/nav/n3-corp-coal-over.gif";	
        
	nsrc_adv_brd = new Image;
	nsrc_adv_brd.src = "/images/nav/n3-nsrc-adv-brd.gif";
		
	nsrc_adv_brd_over = new Image;
	nsrc_adv_brd_over.src = "/images/nav/n3-nsrc-adv-brd-over.gif";   
	
	corp_broch = new Image;
	corp_broch.src = "/images/nav/n3-corp-broch.gif";
		
	corp_broch_over = new Image;
	corp_broch_over.src = "/images/nav/n3-corp-broch-over.gif";	
	
	case_stud = new Image;
	case_stud.src = "/images/nav/n3-case-stud.gif";
		
	case_stud_over = new Image;
	case_stud_over.src = "/images/nav/n3-case-stud-over.gif";
	
	opps_corp = new Image;
	opps_corp.src = "/images/nav/n3-opps-corp.gif";
		
	opps_corp_over = new Image;
	opps_corp_over.src = "/images/nav/n3-opps-corp-over.gif";	
	
}