function ValideForm() {
var valide = false;
var atsign=document.Contact.Email.value;


if (document.Contact.Nom.value.length <2) {
  window.alert("Invalid name !");
  document.Contact.Nom.select();
  document.Contact.Nom.focus();

} 

else if (document.Contact.Prenom.value.length <2) {
  window.alert("Invalid first name !");
  document.Contact.Prenom.select();
  document.Contact.Prenom.focus();

} 

else if (document.Contact.Adresse.value.length <2) {
  window.alert("Invalid address !");
  document.Contact.Adresse.select();
  document.Contact.Adresse.focus();
} 

else if (document.Contact.Code_Postal.value.length <4) {
  window.alert("Invalid zip code !");
  document.Contact.Code_Postal.select();
  document.Contact.Code_Postal.focus();
} 

else if (document.Contact.Commune.value.length <2) {
  window.alert("Invalid town !");
  document.Contact.Commune.select();
  document.Contact.Commune.focus();
} 

else if (document.Contact.Pays.options[document.Contact.Pays.selectedIndex].value == 'choix') {
  window.alert("Invalid country !");
 document.Contact.Pays.focus();
} 

else if ((atsign.indexOf('@') == -1) || (atsign == '')) {
 window.alert (atsign + ' is not a valid e-mail !');
 document.Contact.Email.focus();
 document.Contact.Email.select();
}


else {
valide = true;
document.Contact.envoyer.disabled=true;document.body.className = 'sablier';
}
	
return valide;
}