var xmlHttp

function showList(str)
{ 
xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
  {
  alert ("Your web browser does not support AJAX!");
  return;
  } 
var url="getlist.asp";
url=url+"?yr="+str;
url=url+"&sid="+Math.random();
xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}

function showVehicle(str)
{ 
xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
  {
  alert ("Your web browser does not support AJAX!");
  return;
  } 
var url="getvehicle.asp";
url=url+"?make="+str;
url=url+"&sid="+Math.random();
xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}

function showForm(str)
{ 
xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
  {
  alert ("Your web browser does not support AJAX!");
  return;
  } 
var url="getform.asp";
url=url+"?model="+str;
url=url+"&sid="+Math.random();
xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}


function stateChanged() 
{ 
if (xmlHttp.readyState==4)
{ 
document.getElementById("vehicles").innerHTML=xmlHttp.responseText;
document.getElementById("progress").style.visibility = "hidden";
}
else { document.getElementById("progress").style.visibility = "visible";
}
}

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;
}

/////////////////////////////////////////////////////////