function gradient(id, level) {
	var box = document.getElementById(id);
	box.style.opacity = level;
	box.style.MozOpacity = level;
	box.style.KhtmlOpacity = level;
	box.style.filter = "alpha(opacity=" + level * 100 + ")";
	box.style.display="block";
	return;
}

function fadein(id) {
	var level = 0;
	while(level <= 1)
	{
		setTimeout( "gradient('" + id + "'," + level + ")", (level* 1000) + 10);
		level += 0.01;
	}
}


// Open the lightbox
function openbox(formtitle, fenetre, fenetretitle, fenetrefilter, fadin) {
  var param = fenetre; 
  var title = fenetretitle;
  var filter = fenetrefilter;
  
  var box = document.getElementById(param); 
  document.getElementById(filter).style.display='block';

  var btitle = document.getElementById(title);
  btitle.innerHTML = formtitle;
  
  if(fadin)
  {
	 gradient(param, 0);
	 fadein(param);
  }
  else
  { 	
    param.style.display='block';
  }  	
}

// Close the lightbox
function closebox(fenetre, fenetrefilter) {
  var param = fenetre;
  var filter = fenetrefilter;
  document.getElementById(fenetre).style.display='none';
  document.getElementById(filter).style.display='none';
}