image_1= new Image();
image_1_a= new Image();
image_2= new Image();
image_2_a= new Image();
image_3= new Image();
image_3_a= new Image();
image_4= new Image();
image_4_a= new Image();

image_1_1= new Image();
image_1_1_a= new Image();
image_1_2= new Image();
image_1_2_a= new Image();
image_1_4= new Image();
image_1_4_a= new Image();

image_2_1= new Image();
image_2_1_a= new Image();
image_2_2= new Image();
image_2_2_a= new Image();
image_2_3= new Image();
image_2_3_a= new Image();

image_2_1_1= new Image();
image_2_1_1_a= new Image();
image_2_1_2= new Image();
image_2_1_2_a= new Image();
image_2_1_3= new Image();
image_2_1_3_a= new Image();
image_2_1_6= new Image();
image_2_1_6_a= new Image();

image_2_2_1= new Image();
image_2_2_1_a= new Image();
image_2_2_2= new Image();
image_2_2_2_a= new Image();
image_2_2_3= new Image();
image_2_2_3_a= new Image();
image_2_2_4= new Image();
image_2_2_4_a= new Image();
image_2_2_5= new Image();
image_2_2_5_a= new Image();

image_2_3_1= new Image();
image_2_3_1_a= new Image();
image_2_3_2= new Image();
image_2_3_2_a= new Image();
image_2_3_3= new Image();
image_2_3_3_a= new Image();
image_2_3_4= new Image();
image_2_3_4_a= new Image();

image_4_1= new Image();
image_4_1_a= new Image();
image_4_2= new Image();
image_4_2_a= new Image();

image_1.src = "_pix/nav/unternehmen.gif"
image_1_a.src = "_pix/nav/unternehmen_over.gif"
image_2.src = "_pix/nav/portfolio.gif"
image_2_a.src = "_pix/nav/portfolio_over.gif"
image_3.src = "_pix/nav/referenzen.gif"
image_3_a.src = "_pix/nav/referenzen_over.gif"
image_4.src = "_pix/nav/kontakt.gif"
image_4_a.src = "_pix/nav/kontakt_over.gif"

image_1_1.src = "_pix/nav/unternehmen_profil.gif"
image_1_1_a.src = "_pix/nav/unternehmen_profil_over.gif"
image_1_2.src = "_pix/nav/unternehmen_zahlen.gif"
image_1_2_a.src = "_pix/nav/unternehmen_zahlen_over.gif"
image_1_4.src = "_pix/nav/unternehmen_karriere.gif"
image_1_4_a.src = "_pix/nav/unternehmen_karriere_over.gif"

image_2_1.src = "_pix/nav/loesungen.gif"
image_2_1_a.src = "_pix/nav/loesg_carrier_over.gif"
image_2_2.src = "_pix/nav/loesg_untern.gif"
image_2_2_a.src = "_pix/nav/loesg_untern_over.gif"
image_2_3.src = "_pix/nav/services.gif"
image_2_3_a.src = "_pix/nav/services_over.gif"

image_2_1_1.src = "_pix/nav/loesg_car_coll_med.gif"
image_2_1_1_a.src = "_pix/nav/loesg_car_coll_med_over.gif"
image_2_1_2.src = "_pix/nav/loesg_car_rating.gif"
image_2_1_2_a.src = "_pix/nav/loesg_car_rating_over.gif"
image_2_1_3.src = "_pix/nav/loesg_car_presentment.gif"
image_2_1_3_a.src = "_pix/nav/loesg_car_presentment_over.gif"
image_2_1_6.src = "_pix/nav/loesg_car_loesg_platf.gif"
image_2_1_6_a.src = "_pix/nav/loesg_car_loesg_platf_over.gif"

image_2_2_1.src = "_pix/nav/loesg_untern_leistungsverrechnung.gif"
image_2_2_1_a.src = "_pix/nav/loesg_untern_leistungsverrechnung_over.gif"
image_2_2_2.src = "_pix/nav/loesg_untern_kostentransparenz.gif"
image_2_2_2_a.src = "_pix/nav/loesg_untern_kostentransparenz_over.gif"
image_2_2_3.src = "_pix/nav/loesg_untern_service_delivery.gif"
image_2_2_3_a.src = "_pix/nav/loesg_untern_service_delivery_over.gif"
image_2_2_4.src = "_pix/nav/loesg_untern_leistungskontrolle.gif"
image_2_2_4_a.src = "_pix/nav/loesg_untern_leistungskontrolle_over.gif"
image_2_2_5.src = "_pix/nav/loesg_untern_loesg_platf.gif"
image_2_2_5_a.src = "_pix/nav/loesg_untern_loesg_platf_over.gif"

image_2_3_1.src = "_pix/nav/services_consult.gif"
image_2_3_1_a.src = "_pix/nav/services_consult_over.gif"
image_2_3_2.src = "_pix/nav/services_realisierung.gif"
image_2_3_2_a.src = "_pix/nav/services_realisierung_over.gif"
image_2_3_3.src = "_pix/nav/services_training.gif"
image_2_3_3_a.src = "_pix/nav/services_training_over.gif"
image_2_3_4.src = "_pix/nav/services_support.gif"
image_2_3_4_a.src = "_pix/nav/services_support_over.gif"

image_4_1.src = "_pix/nav/kontaktform.gif"
image_4_1_a.src = "_pix/nav/kontaktform_over.gif"
image_4_2.src = "_pix/nav/wegbeschr.gif"
image_4_2_a.src = "_pix/nav/wegbeschr_over.gif"


function show(nav, image) {
	
	if (document.all) {
		if (nav != '') {
		document.all[nav].style.visibility="visible";
		}
		if (image != '') {
		document.images[image].src = eval(image + "_a.src"); 
		}
	}
	if (document.getElementById){
		if (nav != '') {
		document.getElementById(nav).style.visibility="visible";
		}
		if (image != '') {
		document.images[image].src = eval(image + "_a.src"); 
		}
	}
	else {
		document.layers[nav].visibility = "visible";
		//document.layers[image].document.images[image].src = eval(image+ "_a.src");
	}
}

function hide(nav, image) {
	if (document.all) {
		if (nav != '') {
		document.all[nav].style.visibility="hidden";
		}
		if (image != '') {
		document.images[image].src = eval(image + ".src"); 
		}
	}
	if (document.getElementById){
		if (nav != '') {
		document.getElementById(nav).style.visibility="hidden";
		}
		if (image != '') {
		document.images[image].src = eval(image + ".src"); 
		}
	}
	else {
		document.layers[nav].visibility = "hidden";
		document.layers[image].document.images[image].src = eval(image+ ".src");
	}
}

function show_both(nav, image, nav2, image2) {
 	show(nav, image);
	show(nav2, image2);
}
function hide_both(nav, image, nav2, image2) {
 	hide(nav, image);
	hide(nav2, image2);
}
function show_all(nav, image, nav2, image2, nav3, image3) {
 	show(nav, image);
	show(nav2, image2);
	show(nav3, image3);
}
function hide_all(nav, image, nav2, image2, nav3, image3) {
 	hide(nav, image);
	hide(nav2, image2);
	hide(nav3, image3);
}