var http_request = false;
  function EnviaPOST(url, parameters) {
     http_request = false;
     if (window.XMLHttpRequest) {
        http_request = new XMLHttpRequest();
        if (http_request.overrideMimeType) {
           http_request.overrideMimeType('text/html');
        }
     } else if (window.ActiveXObject) {
        try {
           http_request = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
           try {
              http_request = new ActiveXObject("Microsoft.XMLHTTP");
           } catch (e) {}
        }
     }
     if (!http_request) {
        alert('Cannot create XMLHTTP instance');
        return false;
     }
     http_request.onreadystatechange = alertContents;
     http_request.open('POST', url, true);
     http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
     http_request.setRequestHeader("Content-length", parameters.length);
     http_request.setRequestHeader("Connection", "close");
     http_request.send(parameters);
  }
  function alertContents() {
     if (http_request.readyState == 4) {
        if (http_request.status == 200) {
           result = http_request.responseText;
           document.getElementById('resposta').innerHTML = result;
           document.getElementById('trnome').style.display = 'none';
           document.getElementById('trtel').style.display = 'none';
           document.getElementById('trmsg').style.display = 'none';
           document.getElementById('trresposta').style.display = '';
           
        } else {
           alert('Erro no sistema.');
        }
     }
  }

function ConectaCliente() {
     vNome = document.getElementById("p_nome");
     vEmail = document.getElementById("p_email");
     vPref = document.getElementById("p_pref");
     vTel = document.getElementById("p_tel");
     vCidade = document.getElementById("p_cidade");
     vMsg = document.getElementById("p_msg");
     
     if(vNome.value==''){
         alert('Informe o seu Nome.');
         vNome.focus();
     } else if(vEmail.value==''){
         alert('Informe o seu E-mail.');
         vEmail.focus();
     } else if(vPref.value==''){
         alert('Informe o prefixo do telefone.');
         Pref.focus();
     } else if(vTel.value==''){
         alert('Informe o número do telefone.');
         vTel.focus();
     } else if(vCidade.value==''){
         alert('Informe qual sua cidade.');
         vCidade.focus();
     } else if(vMsg.value==''){
         alert('Digite uma proposta/mensagem.');
         vMsg.focus();

     } else {

           document.getElementById('resposta').innerHTML = '<center>Aguarde! Enviando e-mail...</center>';
           document.getElementById('trnome').style.display = 'none';
           document.getElementById('trtel').style.display = 'none';
           document.getElementById('trmsg').style.display = 'none';
           document.getElementById('trresposta').style.display = '';
     
         var strMail = "nome=" +  encodeURI(vNome.value) +
                   "&email=" + encodeURI(vEmail.value) +
                   "&cidade=" + encodeURI(vCidade.value) +
                   "&tel=" + "(" + encodeURI(vPref.value) + ") - " + encodeURI(vTel.value) +
                   "&msg=" + encodeURI(vMsg.value) +
                   "&veiculo=" + encodeURI(document.getElementById("p_veiculo").value ) +
                   "&valor=" + encodeURI(document.getElementById("p_valor").value ) +
                   "&placa=" + encodeURI(document.getElementById("p_placa").value ) +
                   "&id=" + encodeURI(document.getElementById("p_id").value ) +
                   "&dono=" + encodeURI(document.getElementById("p_dono").value ) +
                   "&dono_email=" + encodeURI(document.getElementById("p_dono_email").value ) +
                   "&url=" + encodeURI(document.getElementById("p_link").value ) +
                   "&prop=" + encodeURI(document.getElementById("p_prop").value ) +
                   "&receber=" + encodeURI(document.getElementById("p_receber").value );
                   EnviaPOST('__pag/contatoEstacionamento.php', strMail);
     }
}