function control(){
var b=0;

if(document.info.nome.value==""){
var a = document.getElementById('nome');
document.getElementById('error').style.display='block';
b=1;
}

if(document.info.cognome.value==""){
var a = document.getElementById('cognome');
document.getElementById('error').style.display='block';
b=1;
}

if(document.info.indirizzo.value==""){
var a = document.getElementById('indirizzo');
document.getElementById('error').style.display='block';
b=1;
}
if(document.info.citta.value==""){
var a = document.getElementById('citta');
document.getElementById('error').style.display='block';
b=1;
}
if(document.info.provincia.value==""){
var a = document.getElementById('provincia');
document.getElementById('error').style.display='block';
b=1;
}

if(document.info.cap.value==""){
var a = document.getElementById('cap');
document.getElementById('error').style.display='block';
b=1;
}
if(document.info.cellulare.value==""){
var a = document.getElementById('cellulare');
document.getElementById('error').style.display='block';
b=1;
}
if(document.info.mittente.value==""){
var a = document.getElementById('mittente');
document.getElementById('error').style.display='block';
b=1;
}

if(document.info.allegato.value==""){
var a = document.getElementById('allegato');
document.getElementById('error').style.display='block';
b=1;
}

if(b==0){
	document.getElementById('error').style.display='none';
}else{
return false;		
}

}


function gradient3(id, level)
{
	var box3 = document.getElementById(id);
	box3.style.opacity = level;
	box3.style.MozOpacity = level;
	box3.style.KhtmlOpacity = level;
	box3.style.filter = "alpha(opacity=" + level * 100 + ")";
	box3.style.display="block";
	
	var box_top = document.getElementById('box_top');
	box_top.style.opacity = level;
	box_top.style.MozOpacity = level;
	box_top.style.KhtmlOpacity = level;
	box_top.style.filter = "alpha(opacity=" + level * 100 + ")";
	box_top.style.display="block";
	
	var box_bottom = document.getElementById('box_bottom');
	box_bottom.style.opacity = level;
	box_bottom.style.MozOpacity = level;
	box_bottom.style.KhtmlOpacity = level;
	box_bottom.style.filter = "alpha(opacity=" + level * 100 + ")";
	box_bottom.style.display="block";
	
	return;
}


function fadein3(id) 
{
	var level = 0;
	while(level <= 1)
	{
		setTimeout( "gradient3('" + id + "'," + level + ")", (level* 100) + 10);
		level += 0.01;
	}
}


// Open the lightbox


function openbox3(formtitle, fadin)
{
  var box3 = document.getElementById('box3'); 
    var box_top = document.getElementById('box_top'); 
	var box_bottom = document.getElementById('box_bottom'); 
  document.getElementById('filter3').style.display='block';
  
  if(fadin)
  {
	 gradient3("box3", 0);
	 fadein3("box3");
	 gradient3("box_top", 0);
	 fadein3("box_top");
	 	 gradient3("box_bottom", 0);
	 fadein3("box_bottom");
  }
  else
  { 	
    box3.style.display='block';
	box_top.style.display='block';
	box_bottom.style.display='block';
  }  	
}


// Close the lightbox

function closebox3()
{
   document.getElementById('box3').style.display='none';
   document.getElementById('box_top').style.display='none';
   document.getElementById('box_bottom').style.display='none';
   document.getElementById('filter3').style.display='none';
      document.getElementById('error').style.display='none';
}