function cadastraNews(sitebase){
	var email = $('#emailNews').attr('value');
	if (!checkMail(email)){
		alert ('E-mail inválido');
	}else{
		var url = sitebase + 'ajax/cadastra-news.php?email=' + email;
		$.get(url, function(result){
			if(result == '1'){
				alert('E-mail já cadastrado anteriormente');
			}else if(result == '0'){
				alert('Digite seu e-mail');
			}else if(result == '2'){
				var htmlStr = 'E-mail cadastrado com sucesso';
				$('#resultadoNews').text(htmlStr);
			}
		})
		
	}
	return false;
}

function checkMail(mail){
	var er = new RegExp(/^[A-Za-z0-9_\-\.]+@[A-Za-z0-9_\-\.]{2,}\.[A-Za-z0-9]{2,}(\.[A-Za-z0-9])?/);
	if(typeof(mail) == "string"){
		if(er.test(mail)){ return true; }
	}else if(typeof(mail) == "object"){
		if(er.test(mail.value)){ 
					return true; 
				}
	}else{
		return false;
		}
}