function go(sezione) {
	FadeOut();
	//req(sezione);
	setTimeout("req('"+sezione+"')",800);
	//setTimeout("FadeIn()",2000);
}


function req(sezione){

new Ajax.Request('testo.php',
  {
    method:'get',
    parameters: {id: sezione},
    onSuccess: function(transport){
      var response = transport.responseText || "no response text";
      document.getElementById('head').innerHTML = response;
      FadeIn();
    },
    onFailure: function(){ alert('Something went wrong...') }
  });
}

function FadeIn(){
	new Effect.BlindDown('content',{duration: 0.8});
	
}

function FadeOut(){
	new Effect.BlindUp('content',{duration: 0.8});
}