function ChampNonVide(ChampNom,message,FormNom) {
 if (document.forms[FormNom].elements[ChampNom].value.length < 1) {
  alert(" "+message);
  document.forms[FormNom].elements[ChampNom].focus();
  return true;
 }
}

function EmailValid (ChampNom,FormNom) {
 adresse = document.forms[FormNom].elements[ChampNom].value;
 var place = adresse.indexOf("@",1);
 var point = adresse.indexOf(".",place+1);
  if ((place > -1)&&(adresse.length >2)&&(point > 1)) {
  return false;
  }
	else {
   alert("Votre adresse e-mail n'est pas valide");
   document.forms[FormNom].elements[ChampNom].focus();
   return true;
  }
}


function validFormPseudo(FormNom,action) {

 if (ChampNonVide('pseudoA' ,'Veuillez saisir votre pseudo', FormNom)) return false; 
 if (EmailValid ('emailA' , FormNom)) return false; 

 goForm(FormNom,action,'formtransat');
}


function getXhr(){
               var xhr = null; 
				if(window.XMLHttpRequest) // Firefox et autres
				   xhr = new XMLHttpRequest(); 
				else if(window.ActiveXObject){ // Internet Explorer 
				   try {
			                xhr = new ActiveXObject("Msxml2.XMLHTTP");
			            } catch (e) {
			                xhr = new ActiveXObject("Microsoft.XMLHTTP");
			            }
				}
				else { // XMLHttpRequest non supporté par le navigateur 
				   alert("Votre navigateur ne supporte pas les objets XMLHTTPRequest..."); 
				   xhr = false; 
				} 
                return xhr;
}
			
			
function goForm(FormNom,url,id){
	
				var xhr = getXhr();
			
     			xhr.open("POST",url,true);
			
				xhr.onreadystatechange = function(){
					//alert(xhr.readyState);
								
					//if(xhr.readyState == 4 && xhr.status == 200){
					if(xhr.readyState == 4){
						document.getElementById(id).innerHTML = xhr.responseText;
						
					}
				
					document.getElementById(id).innerHTML = xhr.responseText;
				}
				
				
				
				xhr.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
		
				pseudo = encodeURIComponent(document.forms[FormNom].pseudoA.value);
				email = document.forms[FormNom].emailA.value;
	            xhr.send("envoi=1&pseudo="+pseudo+"&email="+email);
				
			
			}



var effect = 1;
var time = 4000;

var current_image = 0;
var next_image = 1;
var image = new Array();

function init() {
	if(document.getElementsByClassName("image")) {
		image = document.getElementsByClassName("image");
		for(i=1; i < image.length; i++) {
			image[i].style.display = "none";
		}
	}
	
	if(image.length > 1) galerie();
}

function galerie() {
	self.setTimeout("nextimage()",time);	
}

function nextimage() {
	if(effect == 1) { new Effect.Fade(image[current_image]); new Effect.Appear(image[next_image]); }
	if(effect == 2) { new Effect.BlindUp(image[current_image]); new Effect.BlindDown(image[next_image]); }
	
	if(next_image == (image.length-1)) {
		current_image = next_image;
		next_image = 0;
	} else {
		current_image = next_image;
		next_image++;
	}
	galerie();
}