if(navigator.appName.indexOf('Microsoft') > -1){
        var ie = true;
    }else{
        var ie = false;
    }
    
    
    var fadein_opacity = 100;
    var fadeout_opacity = 0;
    var schrittweite = 10;
    
    function fadeIn(value, my_opacity){
       e = document.getElementById(value);
       
       if(my_opacity < 100){
           my_opacity = my_opacity + schrittweite; 
           
           if(ie){ 
              e.style.filter = "Alpha(opacity=" + my_opacity + ")";
           }else{
              e.style.MozOpacity = (my_opacity/100)-.001;
           }
           
           if(my_opacity < fadein_opacity){
                window.setTimeout("fadeIn('" + value + "', " + my_opacity +")",30);
           }
       }
    }
    
    function fadeOut(value, my_opacity){
       e = document.getElementById(value);
       
       if(my_opacity > 0){ 
           my_opacity = my_opacity - schrittweite; 
           
           if(ie){ 
              e.style.filter = "Alpha(opacity=" + my_opacity + ")";
           }else{
              e.style.MozOpacity = (my_opacity/100)-.001;
           }
           
           if(my_opacity > fadeout_opacity){
                window.setTimeout("fadeOut('" + value + "', " + my_opacity +")",30);
           }else{
                window.setTimeout("fadeOut('" + value + "', 0)",30);
           }
       }
    }