function animazione(div){

var frame = 0;
for(var i = 0; i<100; i++){
setTimeout("setOpacityMY('"+div+"','"+(i)+"')", 4*frame);
frame++;}

}  


function animazioneout(div){

var frame = 0;
for(var i = 100; i>0; i--){
setTimeout("setOpacityMY('"+div+"','"+(i)+"')", 4*frame);
frame++;}

}  




function setOpacityMY(id, opacity) {
    var element = document.getElementById(id);
    if(document.all)
      element.style.filter = "alpha(opacity=" + opacity + ")";
    else
      element.style.opacity = opacity / 100;
  }