// JavaScript Document

function verif()
	{
	var valid = true, 
	output = '';

if (document.form1.nom.value.length == 0) 
		{valid = false; output += 'nom\n'; }
if (document.form1.prenom.value.length == 0) 
		{valid = false; output += 'prenom\n'; }
if (document.form1.email.value != "" 
	&& document.form1.email.value.indexOf("@") != "-1" 
	&& document.form1.email.value.indexOf(".")!="-1" ) {} else {valid = false;	output += 'e-mail\n';}
if (document.form1.tel.value.length == 0) 
		{valid = false; output += 'téléphone\n'; }
if (document.form1.societe.value.length == 0) 
		{valid = false; output += 'société\n'; }
if (!valid)
	{
	alert('Des informations sont manquantes ou incorrectes :\n\n'+ output);
	}
	
if (valid)
	{
	document.form1.submit()
	}

}