// JavaScript Document

function check_email(email){
	if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,4})+$/.test(email)){
		return true;
	}else{
		return false;
	}
}

function send_email_address(f, err){
	if (f.email.value == ''){
		return false;
	}else if (!check_email(f.email.value)){
		alert(err)
		return false;
	}
	document.getElementById('div_newsletter_1').style.display = 'none';
	document.getElementById('div_newsletter_2').style.display = 'block';
	return true;
}