var xmlHttp
var yr
var mk
var md

/* show makes */
function showMake(str)
{
xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 
var url="getmakes.asp";
yr = str
url=url+"?yr="+yr;
url=url+"&sid="+Math.random();
xmlHttp.onreadystatechange=stateChangedv;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}

/* show Models */
function showModel(sel)
{
xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 
var url="getModels.asp";
mk = sel
url=url+"?m="+mk;
url=url+"&y="+yr;
url=url+"&sid="+Math.random();
xmlHttp.onreadystatechange=stateChangedm;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}

/* show Racks */
function showRacks(sel)
{
xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 
var url="get_fact_racks.asp";
md = sel
url=url+"?m="+mk;
url=url+"&y="+yr;
url=url+"&md="+md;
url=url+"&sid="+Math.random();
xmlHttp.onreadystatechange=stateChangeFCT;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}

/*submit*/
function showsubmit(sel)
{
xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  }
var url="test.asp";
fct = sel
url=url+"?m="+mk;
url=url+"&y="+yr;
url=url+"&md="+md;
url=url+"&frck="+fct;
url=url+"&sid="+Math.random();
xmlHttp.onreadystatechange=stateChangesub;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}

function stateChangedv() 
{ 
if (xmlHttp.readyState==4)
{ 
document.getElementById("txtVeh").innerHTML=xmlHttp.responseText;
}
}

function stateChangedm() 
{ 
if (xmlHttp.readyState==4)
{ 
document.getElementById("txtMod").innerHTML=xmlHttp.responseText;
}
}

function stateChangedm() 
{ 
if (xmlHttp.readyState==4)
{ 
document.getElementById("txtMod").innerHTML=xmlHttp.responseText;
}
}

function stateChangeFCT() 
{ 
if (xmlHttp.readyState==4)
{ 
document.getElementById("fact").innerHTML=xmlHttp.responseText;
}
}

function stateChangesub() 
{ 
if (xmlHttp.readyState==4)
{ 
document.getElementById("Submit").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;
}