Effetto "fade", ma non funziona....?!?

[artorius]

Prova a fare:

function setOpa(obj,opa){ 
    // IE/Win 
        obj.style.filter = "alpha(opacity:"+opa+")"; 
        // Safari<1.2, Konqueror 
        obj.style.KHTMLOpacity = opa/100; 
        // Older Mozilla and Firefox 
        obj.style.MozOpacity = opa/100; 
        // Safari 1.2, newer Firefox and Mozilla, CSS3 
        obj.style.opacity = opa/100; 
} 

function opacitaIn(){ 
     
    if(!document.getElementById) return; 
     
    if(opaC <= 100){ 
         setOpa(objE,opaC); 
         opaC += 5; 
    } 
    else
        clearInterval(interval);
         
}

var opaC, objE;
var interval;

function start(id){
   opaC = 50;
   objE = document.getElementById(id);
   interval = setInterval(opacitaIn, 500)
} 

Basta che chiami start('mHome')