function trocaLogin() {
	var email = $('emaillogin');

	if (email.value == 'E-MAIL') {
		email.value = '';
	} else if (email.value == '') {
		email.value = 'E-MAIL';
	}
}


function loginempresa() {
	var email = $('emaillogin');
	var senha = $('senhalogin');

	new Ajax.Request(base_url + 'login/autentica/', {
		method:'post',
		parameters: {email: email.value, senha: senha.value},
		asynchronous: false,
		onSuccess: function(transport) {
			auth = transport.responseText;

			if (auth != 0)
				location.href=base_url;
			else
				alert('E-mail ou senha incorretos.');
		}
	});
}