var xmlHttp;

function showmodel(str,mod)
{ 
xmlHttp=createXMLHttp();
if (xmlHttp==null)
 {
 alert ("Browser does not support HTTP Request");
 return;
 }
var url="getmodel.php";
url=url+"?q="+str;
url=url+"&m="+mod;
url=url+"&sid="+Math.random();

xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}

function showyear(str)
{ 
xmlHttp=createXMLHttp();
if (xmlHttp==null)
 {
 alert ("Browser does not support HTTP Request");
 return;
 }
var url="getyear.php";

url=url+"?q="+str;
//url=url+"&m="+document.getElementById(mod).value
//url=url+"&sid="+Math.random()
xmlHttp.onreadystatechange=modelChanged; 
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}

function showcate(str)
{ 
xmlHttp=createXMLHttp();
if (xmlHttp==null)
 {
 alert ("Browser does not support HTTP Request");
 return;
 }
var url="getcate.php";

url=url+"?q="+document.getElementById(str).value;
url=url+"&sid="+Math.random();
xmlHttp.onreadystatechange=cateChanged; 
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}

function showsubcat1(str)
{ 
xmlHttp=createXMLHttp();
if (xmlHttp==null)
 {
 alert ("Browser does not support HTTP Request");
 return;
 }
var url="getsubcat1.php";

url=url+"?q="+document.getElementById(str).value;
url=url+"&sid="+Math.random();
xmlHttp.onreadystatechange=subcat1Changed;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}

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

function modelChanged() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
 { 
 document.getElementById("txtyear").innerHTML="";
 document.getElementById("txtyear").innerHTML=xmlHttp.responseText; 
 } 
}

function cateChanged() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
 { 
 document.getElementById("txtcate").innerHTML="";
 document.getElementById("txtcate").innerHTML=xmlHttp.responseText; 
 } 
}

function subcat1Changed() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
 { 
 document.getElementById("txtsubcat1").innerHTML="";
 document.getElementById("txtsubcat1").innerHTML=xmlHttp.responseText; 
 } 
}

// felix@ferolen.com 25/March/09 to replace buggy GetXmlHttpObject()
function createXMLHttp() {
    if (typeof XMLHttpRequest != "undefined") {
        return new XMLHttpRequest();
    } else if (window.ActiveXObject) {
      var aVersions = [ "MSXML2.XMLHttp.5.0",
        "MSXML2.XMLHttp.4.0","MSXML2.XMLHttp.3.0",
        "MSXML2.XMLHttp","Microsoft.XMLHttp"
      ];

      for (var i = 0; i < aVersions.length; i++) {
        try {
            var oXmlHttp = new ActiveXObject(aVersions[i]);
            return oXmlHttp;
        } catch (oError) {
            //Do nothing
        }
      }
    }
    throw new Error("Browser does not support AJAX: XMLHttp object could be created.");
}


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;
}