function fct_envoie_client(){
  var  err="";
// messages au cas ou un champ est vide
var mg="Merci de remplir tous les champs obligatoires !";
var mge="Merci de vérifier votre  adresses E-mail !";
	//obligatoire 
 a1  =document.forms['client'].elements['txtprenom'].value;
 a2  =document.forms['client'].elements['txtmail'].value;
 a3  =document.forms['client'].elements['txtnom'].value;
 a4  =document.forms['client'].elements['txtcin'].value;
 a5  =document.forms['client'].elements['txtadresse'].value;
 a6  =document.forms['client'].elements['txtville'].value;
 a7	 =document.forms['client'].elements['txtcodepostal'].value;

 a8	 =document.forms['client'].elements['txttelpro'].value;
 a9  =document.forms['client'].elements['txtteldom'].value;
 a10 =document.forms['client'].elements['txtgsm'].value;
 a11 =document.forms['client'].elements['txtfax'].value;
 a12 =document.forms['client'].elements['txtdombanc'].value;
 a13 =document.forms['client'].elements['txtbanque'].value;
 a14 =document.forms['client'].elements['txtagance'].value;
 a15 =document.forms['client'].elements['txtvillebanque'].value;
 a16 =document.forms['client'].elements['txtnumcompte'].value;
 a17 =document.forms['client'].elements['txtcontact'].value;


	// traitement : le cas ou l'un des champ est vide 
    if(vide(a1)||vide(a2)||vide(a3)||vide(a4)||vide(a5)||vide(a6)||vide(a7)||vide(a8)||vide(a9)||vide(a10)||vide(a11)||vide(a12)||vide(a13)||vide(a14)||vide(a15)||vide(a16)||vide(a17) ){ err=mg;}
	
    else if(fct_email(a2)) {  err=mge;}
	
	
	if(err!=""){
		alert(err);
	return document.MM_returnValue= (err == '');
	}
	else
	{ 
   document.forms['client'].action="../commun/devenir_client.php";
   return document.MM_returnValue= (err == '');
   }
}