var Don = {};

Don.form = {
  elForm : null,
  "onSubmit" : function (form){
    Don.form.recup_montant();
    Don.form.elForm = $(form);
    new Ajax.Request(Don.form.elForm.action, { method: 'post', 
	  onComplete: Don.form.gestionReponse,
	  parameters : Don.form.elForm.serialize(true)
    });
  },
  "gestionReponse" : function(xhr) {
    var resultat = $('resultat');
    if (xhr.status == 200){
      var res = xhr.responseText.evalJSON();
      if(res.error != 0){
        Don.form.elForm = null;
        alert(res.msg);
      }
      else{
        Don.form.elForm.action = res.action;
        Don.form.elForm.submit();
      }
    }
    else{
      $('resultat').innerHTML = xhr.status;
    }
  },
  "recup_montant" : function(){
    montant = -1;
    if($F('MontantLibre')!=""){
      montant = $F('MontantLibre')*1;
    }
    if($F('MontantFixe1')!=null){
      montant = $F('MontantFixe1');
    }
    if($F('MontantFixe2')!=null){
      montant = $F('MontantFixe2');
    }
    if($F('MontantFixe3')!=null){
      montant = $F('MontantFixe3');
    }
    if($F('MontantFixe4')!=null){
      montant = $F('MontantFixe4');
    }
    $('montant1').value = Number(montant);
  }

}