function wybierzModel(){
 var ajaxRequest;

try{
 ajaxRequest = new XMLHttpRequest();
 } catch (e){
 try{
 ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
 } catch (e) {
 try{
 ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
 } catch (e){
 alert("Your browser broke!");
 return false;
 }
 }
 }

ajaxRequest.onreadystatechange = function(){
 if(ajaxRequest.readyState == 4){
 var ajaxDisplay = document.getElementById('modelDiv');
 ajaxDisplay.innerHTML = ajaxRequest.responseText;
 }
 }
 var marka = document.getElementById('marka').value;
 var queryString = "?marka=" + marka;
 ajaxRequest.open("GET", "model.php" + queryString, true);
 ajaxRequest.send(null);
 }
 
 function wybierzSilnik(){
 var ajaxRequest;

try{
 ajaxRequest = new XMLHttpRequest();
 } catch (e){
 try{
 ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
 } catch (e) {
 try{
 ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
 } catch (e){
 alert("Your browser broke!");
 return false;
 }
 }
 }

ajaxRequest.onreadystatechange = function(){
 if(ajaxRequest.readyState == 4){
 var ajaxDisplay = document.getElementById('silnikDiv');
 ajaxDisplay.innerHTML = ajaxRequest.responseText;
 }
 }
 var model = document.getElementById('model').value;
 var queryString = "?model=" + model;
 ajaxRequest.open("GET", "silnik.php" + queryString, true);
 ajaxRequest.send(null);
 }
 
function twybierzModel(){
 var ajaxRequest;

try{
 ajaxRequest = new XMLHttpRequest();
 } catch (e){
 try{
 ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
 } catch (e) {
 try{
 ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
 } catch (e){
 alert("Your browser broke!");
 return false;
 }
 }
 }

ajaxRequest.onreadystatechange = function(){
 if(ajaxRequest.readyState == 4){
 var ajaxDisplay = document.getElementById('tmodelDiv');
 ajaxDisplay.innerHTML = ajaxRequest.responseText;
 }
 }
 var marka = document.getElementById('tmarka').value;
 var queryString = "?marka=" + marka;
 ajaxRequest.open("GET", "tmodel.php" + queryString, true);
 ajaxRequest.send(null);
 }
 
 function twybierzSilnik(){
 var ajaxRequest;

try{
 ajaxRequest = new XMLHttpRequest();
 } catch (e){
 try{
 ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
 } catch (e) {
 try{
 ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
 } catch (e){
 alert("Your browser broke!");
 return false;
 }
 }
 }

ajaxRequest.onreadystatechange = function(){
 if(ajaxRequest.readyState == 4){
 var ajaxDisplay = document.getElementById('tsilnikDiv');
 ajaxDisplay.innerHTML = ajaxRequest.responseText;
 }
 }
 var model = document.getElementById('tmodel').value;
 var queryString = "?model=" + model;
 ajaxRequest.open("GET", "tsilnik.php" + queryString, true);
 ajaxRequest.send(null);
 }