var xmlHttp

function showHint(str)
{
	if (str.length==0)
	{ 
	  document.getElementById("getMake").innerHTML=""
	  return
	}
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null)
	{
	  alert ("Browser does not support HTTP Request")
	  return
	} 
	var url="showmakemodel.php"
	url=url+"?year="+str
	xmlHttp.onreadystatechange=stateChanged 
	xmlHttp.open("GET",url,true)
	xmlHttp.send(null)
} 

function stateChanged() 
{ 
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
	{ 
		document.getElementById("getMake").innerHTML=xmlHttp.responseText 
	} 
}



function showModel(year,make)
{
	if (year.length==0)
	{ 
	  document.getElementById("getModel").innerHTML=""
	  return
	}
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null)
	{
	  alert ("Browser does not support HTTP Request")
	  return
	} 
	var url="showmakemodel.php"
	url=url+"?year="+year+"&make="+make
	xmlHttp.onreadystatechange=stateChanged1
	xmlHttp.open("GET",url,true)
	xmlHttp.send(null)
} 

function stateChanged1() 
{ 
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
	{ 
		document.getElementById("getModel").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;
}