function verif_form(form) {

	if (form.email) {
		document.getElementById('warning').innerHTML='';
		if (!form.email.value) { document.getElementById('warning').innerHTML='Verify your email'; return false;}
		var adresse = form.email.value;
		var place = adresse.indexOf("@",1);
		var point = adresse.indexOf(".",place+1);
		if ((place < 0)||(adresse.length < 3)||(point < 2)) {document.getElementById('warning').innerHTML='Verify your email'; return false; }
	}
	
}