function changeNavi(firstLevel,secLevel) {

  preload(firstLevel);
// austauschen der Bilder der Hauptnavigation und des Logos
  document.logo.src = "../../images/" + firstLevel + "/logo.gif";
  document.benvenuto.src = eval( "benvenutoup.src" );
  document.attuale.src = eval( "attualeup.src" );
  document.viaggi.src = eval( "viaggiup.src" );
  document.metodo.src = eval( "metodoup.src" );
  document.corsi.src = eval( "corsiup.src" );
  document.servizi.src = eval( "serviziup.src" );
  document.contatto.src = "../../images/" + firstLevel + "/contatto.gif";

// Setzen des "down" Status der Primärnavigation  
  if(firstLevel != "home") document[ firstLevel ].src = "../../images/" + firstLevel + "/" + firstLevel + "_down.png";
// austauschen des Bildes der Sekundärnavigation wenn erwünscht

  
  if(ns4) {
		arrLayer = new Array("Div_benvenuto", "Div_attuale", "Div_viaggi", "Div_metodo", "Div_corsi", "Div_servizi");
    for (var i=0; i < arrLayer.length; ++i) {
      nr=0;
      while (document[arrLayer[i]].document.images[nr]) {
	      if(document[arrLayer[i]].document.images[nr].src.search("bullet_down")!=-1) {
        	document[arrLayer[i]].document.images[nr].src = "../../images/bullet.gif";
	      }
	      nr++;
      } 	
	    if(secLevel) {
	      document["Div_" + firstLevel].document[ secLevel ].src = "../../images/bullet_down.gif";
			}
	  }
	}
	else {  
    nr=0;
    while (document.images[nr]) {
	    if(document.images[nr].src.search("bullet_down")!=-1) {
	      document.images[nr].src = "../../images/bullet.gif";
	    }
	    nr++;
    } 
	  if(secLevel) {
	    document[ secLevel ].src = "../../images/bullet_down.gif";
	  }
  }
	

// ändern der Hintergrundfarbe
  switch(firstLevel) {
		case "benvenuto":
			document.bgColor ="#B5D5E1";
		break;
 
		case "attuale":
			document.bgColor ="#F8D692";
		break;
 
		case "viaggi":
			document.bgColor ="#BAE5F6";
		break;

		case "metodo":
			document.bgColor ="#BBDCD1";
		break;
 
		case "corsi":
			document.bgColor ="#FFFF99";
		break;
 
		case "servizi":
    	document.bgColor ="#FFCC66"; //E6D695
		break;
 
		case "home":
			document.bgColor ="#F9E2BB";
		break;
  }
  
// Anzeige des Layer's mit der sekundärnavigation
  showSubMenue(firstLevel); 

}