function checkform ( form )
{
  for (i=0;i<form.raisonsoc.length;i++) 
  {
   if (form.raisonsoc[i].checked==true)
   {
	if ( (form.raisonsoc[i].value == "societe") && (form.societe.value == "") ) 
	{
     alert( "Probleme Société" );    
     return false ;
    }
   }
  }
  if ( (form.raisonsoc.value == "societe") && (form.societe.value == "") ) {
    alert( "Probleme Société" );    
    return false ;
  }
  if (form.site.value == "") {
    alert( "Probleme Site Internet" );    
    return false ;
  }
  if (form.nom.value == "") {
    alert( "Probleme Nom" );    
    return false ;
  }
  if (form.prenom.value == "") {
    alert( "Probleme Prénom" );    
    return false ;
  }
  if (form.adresse.value == "") {
    alert( "Probleme Adresse" );    
    return false ;
  }
  if (form.cp.value == "") {
    alert( "Probleme Code Postal" );    
    return false ;
  }
  if (form.ville.value == "") {
    alert( "Probleme Ville" );    
    return false ;
  }
  if (form.pays.value == "") {
    alert( "Probleme Pays" );    
    return false ;
  }
  if (form.naiss.value == "") {
    alert( "Probleme Date de Naissance" );    
    return false ;
  }
  if (form.email.value == "") {
    alert( "Probleme Email" );    
    return false ;
  }
  if (form.tel.value == "") {
    alert( "Probleme Téléphone" );    
    return false ;
  }
  if (form.login.value == "") {
    alert( "Probleme Login" );    
    return false ;
  }
  if (form.pass.value == "") {
    alert( "Probleme Pass" );    
    return false ;
  }
  if (form.pass2.value == "") {
    alert( "Probleme Pass" );    
    return false ;
  }
  if (form.pass2.value != form.pass.value) {
    alert( "Probleme Pass pas identiques" );    
    return false ;
  }
  if (form.cgv.checked == false) {
    alert( "Veuillez accepter les conditions en cochant la case." );    
    return false ;
  }
  return true ;
}