var xmlHttp
var partField = 0;
function showYear(stra)
{ 
xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 
var aurl="/includes/year.php";
partField = 2;
aurl=aurl+"?q="+stra;
xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open("GET",aurl,true);
xmlHttp.send(null);
}
function showModel(str)
{ 
xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 
var url="/includes/model.php";
partField = 1;
url=url+"?q="+str;
xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}

function stateChanged() 
{ 
if (xmlHttp.readyState==4)
{ 
if(partField == 1) {
document.getElementById("partModel").innerHTML=xmlHttp.responseText;
} 
else if (partField == 3) {
document.getElementById("partModela").innerHTML=xmlHttp.responseText;
}
else {
document.getElementById("partYear").innerHTML=xmlHttp.responseText;
}
}
}

function GetXmlHttpObject()
{
var xmlHttp=null;
try
  {
  // Firefox, Opera 8.0+, Safari
  xmlHttp=new XMLHttpRequest();
  }
catch (e)
  {
  // Internet Explorer
  try
    {
    xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
    }
  catch (e)
    {
    xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
  }
return xmlHttp;
}


function showModela(str)
{ 
xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 
var url="/includes/model.php";
partField = 3;
url=url+"?q="+str;
xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}