function verif(form)
{
	var message ='';
	var MailExp =/^[A-Za-z0-9\.\-_]+[@][A-Za-z0-9\-\.]+[\.][A-Za-z][A-Za-z][A-Za-z]?$/;
	if(form.email.value=='') message=message+'Email \n';
	else if(!MailExp.test(form.email.value)) message=message+'Invalid Email \n';
	if(message != '') alert('yous must check the following fields : \n'+message);
	else {	$email=form.email.value;
		 	form.email.value='';
			open('newsletter.php?email='+$email,'newsletter', 'toolbar=no, width=500, height=280, scrollbars=no, resizable=yes, status=no');
			
	}
}