Grazie Stan del tuo aiuto, ma non riesco a lavorare con la questione della variabile che tu dici, allego il file di partenza su cui stò facendo le prove http://www.mediafire.com/?8z24d2n37bpb4fa

var saved va inserito una volta sola oppure devo fare
var saved1
var saved2
var saved3

Non sò se può essere d'aiuto anche questo codice che ho trovato:
Codice PHP:
//create a "blank" variable that can stand in
//for any of your pages:
var currentPage:MovieClip;

//START Initial page load settings
addChild(homestuff);
homestuff.alpha 0;
TweenLite.to(homestuff1, {alpha:1});
currentPage homestuff;


linkBtn1.addEventListener(MouseEvent.CLICKshowhome);
function 
showhome(evt:MouseEvent):void {
    if(
homestuff != currentPage) {
        
//fade out currentPage:
        
TweenLite.to(currentPage1, {alpha:0});
        
//fade in homestuff:
        
addChild(homestuff);
        
homestuff.alpha 0;
        
TweenLite.to(homestuff1, {alpha:1onComplete:switcherooonCompleteParams:[homestuff]});
    }
}
linkBtn2.addEventListener(MouseEvent.CLICKshowlocation);
function 
showlocation(evt:MouseEvent):void {
    if(
locationstuff != currentPage) {
        
//fade out currentPage:
        
TweenLite.to(currentPage1, {alpha:0});
        
//fade in locationstuff:
        
addChild(locationstuff);
        
locationstuff.alpha 0;
        
TweenLite.to(locationstuff1, {alpha:1onComplete:switcherooonCompleteParams:[locationstuff]});
    }
}
linkBtn3.addEventListener(MouseEvent.CLICKshowtenants);
function 
showtenants(evt:MouseEvent):void {
    if(
tenantsstuff != currentPage) {
        
//fade out currentPage:
        
TweenLite.to(currentPage1, {alpha:0});
        
//fade in tenantsstuff:
        
addChild(tenantsstuff);
        
tenantsstuff.alpha 0;
        
TweenLite.to(tenantsstuff1, {alpha:1onComplete:switcherooonCompleteParams:[tenantsstuff]});
    }
}
linkBtn4.addEventListener(MouseEvent.CLICKshowdesign);
function 
showdesign(evt:MouseEvent):void {
    if(
designstuff != currentPage) {
        
//fade out currentPage:
        
TweenLite.to(currentPage1, {alpha:0});
        
//fade in designstuff:
        
addChild(designstuff);
        
designstuff.alpha 0;
        
TweenLite.to(designstuff1, {alpha:1onComplete:switcherooonCompleteParams:[designstuff]});
    }
}
linkBtn5.addEventListener(MouseEvent.CLICKshowcontact);
function 
showcontact(evt:MouseEvent):void {
    if(
contactstuff != currentPage) {
        
//fade out currentPage:
        
TweenLite.to(currentPage1, {alpha:0});
        
//fade in contactstuff:
        
addChild(contactstuff);
        
contactstuff.alpha 0;
        
TweenLite.to(contactstuff1, {alpha:1onComplete:switcherooonCompleteParams:[contactstuff]});
    }
}
//function that removes the current page and then resets it to the new choice:
function switcheroo(theNewPage:MovieClip):void {
    
removeChild(currentPage);
    
currentPage theNewPage;

Ho provato a personalizzarlo ma riscontro questi errori
Codice PHP:
Scena 1livello 'Livello 1'fotogramma 1riga 16    1176Confronto tra un valore di tipo statico Class e un tipo flash.display:MovieClip che potrebbe non essere correlato.
Scena 1livello 'Livello 1'fotogramma 1riga 20    1067Assegnazione forzata implicita di un valore del tipo Class a un tipo flash.display:DisplayObject non correlato.
Scena 1livello 'Livello 1'fotogramma 1riga 21    1119Accesso a una proprietà non definita alpha mediante un riferimento con tipo statico Class.