var xmlhttp
var progress_bar = new Image();
	progress_bar.src = 'http://www.avidrc.com/images/load.gif';


function formGetClasses(form) {
	var myManufacturerId = document.getElementById('listManufacturers').value;
	showClasses(myManufacturerId);
}

function formGetCars(form) {
	var myCarId = document.getElementById('listClasses').value;
	showCars(myCarId);
}








function showClasses(str)
{
xmlhttp=GetXmlHttpObject();
if (xmlhttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  }

var url="/flexkit/drops/drops.php";
url=url+"?classes="+str;
url=url+"&sid="+Math.random();
xmlhttp.onreadystatechange=stateChangedClasses;
xmlhttp.open("GET",url,true);
xmlhttp.send(null);
}

function showCars(str)
{
xmlhttp=GetXmlHttpObject();
if (xmlhttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  }

var url="/flexkit/drops/drops.php";
url=url+"?cars="+str;
url=url+"&sid="+Math.random();
xmlhttp.onreadystatechange=stateChangedCars;
xmlhttp.open("GET",url,true);
xmlhttp.send(null);
}






function stateChangedClasses()
{
	if((xmlhttp.readyState == 4) && (xmlhttp.status == 200)){
	  document.getElementById("selectClasses").innerHTML = xmlhttp.responseText;
	  document.getElementById("selectCars").innerHTML = '';
	} else {
		document.getElementById("selectClasses").innerHTML= '<img style="margin-left:5px" src="http://www.avidrc.com/images/load.gif">';
	  //document.getElementById("txtPrice").innerHTML= '<img style="margin-left:5px" src="http://www.avidrc.com/images/load.gif">';
	 // document.getElementById("txtPrice2").innerHTML= '<img style="margin-left:5px" src="http://www.avidrc.com/images/load.gif">';
	  //document.getElementById("txtAvail").innerHTML= '<img style="margin-left:5px" src="http://www.avidrc.com/images/load.gif">';
	}
}

function stateChangedCars()
{
	if((xmlhttp.readyState == 4) && (xmlhttp.status == 200)){
	  document.getElementById("selectCars").innerHTML = xmlhttp.responseText;
	} else {
		document.getElementById("selectCars").innerHTML= '<img style="margin-left:5px" src="http://www.avidrc.com/images/load.gif">';
	  //document.getElementById("txtPrice").innerHTML= '<img style="margin-left:5px" src="http://www.avidrc.com/images/load.gif">';
	 // document.getElementById("txtPrice2").innerHTML= '<img style="margin-left:5px" src="http://www.avidrc.com/images/load.gif">';
	  //document.getElementById("txtAvail").innerHTML= '<img style="margin-left:5px" src="http://www.avidrc.com/images/load.gif">';
	}
}



function GetXmlHttpObject()
{
if (window.XMLHttpRequest)
  {
  // code for IE7+, Firefox, Chrome, Opera, Safari
  return new XMLHttpRequest();
  }
if (window.ActiveXObject)
  {
  // code for IE6, IE5
  return new ActiveXObject("Microsoft.XMLHTTP");
  }
return null;
}