var LogaImages;
    function LogaStart(){
        if($('loga') != undefined){
            LogaImages = $('loga').getElementsByTagName('A');
            if (LogaImages.length > 1){
                for (var i = 0 ; i < LogaImages.length ; i++){
                    LogaImages[i].style.zIndex = i+1;
                    LogaImages[i].style.visibility = 'visible';
                }
                LogaImage(LogaImages.length-1);
            }
        }
    }
    function LogaImage(imageIdx){
        if (imageIdx < 0){
            imageIdx = LogaImages.length-1;
        }
        LogaImageFade(imageIdx);
    }
    function LogaImageFade(imageIdx){
        new Effect.Opacity(
            LogaImages[imageIdx],
            {
                'duration':1.5,
                'from':1,
                'to':0,
                'afterFinish':function () {
                    for (var i = 0 ; i < LogaImages.length ; i++){
                        var e = LogaImages[i];
                        LogaImages[i].style.zIndex++;
                    }
                    LogaImages[imageIdx].style.zIndex = 1;
                    new Effect.Opacity(LogaImages[imageIdx],{'from':1,'to':1,'duration':0});
                    window.setTimeout(
                        function() {
                            LogaImage(imageIdx-1);
                        },
                        2000
                    );
                }
            }
        );
    }
    
    function initLoga(){
        window.setTimeout(LogaStart,2000);
    }
    
    addLoadEvent(initLoga);