var id_formulaire;
function valider_mess(id_formulaire) {
if (document.forms[id_formulaire].nom.value == "") {alert("Please specify your name"); document.forms[id_formulaire].elements['nom'].focus(); return false;}

if (document.forms[id_formulaire].mont_tra.value == "") {alert("Please specify the amount of transaction"); document.forms[id_formulaire].elements['mont_tra'].focus(); return false;}
else
if (isNaN(document.forms[id_formulaire].mont_tra.value)) {alert("Please specify the digital amount"); document.forms[id_formulaire].elements['mont_tra'].focus(); return false;}
else
if (document.forms[id_formulaire].mont_tra.value <= 0) {alert("Please specify a greater than 0 amount"); document.forms[id_formulaire].elements['mont_tra'].focus(); return false;}

if (document.forms[id_formulaire].email.value == "") {alert("Please specify your E-Mail"); document.forms[id_formulaire].elements['email'].focus(); return false;}
if (document.forms[id_formulaire].email.value != ""){
if ((document.forms[id_formulaire].email.value.indexOf('@',0)==-1) || (document.forms[id_formulaire].email.value.indexOf('.',0)==-1)) {alert("Please enter a valid e-mail address"); document.forms[id_formulaire].elements['email'].focus(); return false;}
}
else {
	return true;
}}