function disp_text()
   {
   var w = document.frmSelect.mylist.selectedIndex;
   var selected_text = document.frmSelect.mylist.options[w].text;
   //alert(selected_text);

//var value=document.frmSelect.new_used.value;

//alert("hi");
//alert(value);

xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  }
var url="getcars.php?type="+selected_text;
xmlHttp.onreadystatechange=adminuser;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}

function adminuser()
{
if(xmlHttp.readyState!=4)
{
//document.frmSelect.make.disabled=false;
document.getElementById('make1').innerHTML="<select name='make' disabled onChange='disp_model()' style='width: 110px; margin-left: 6px;'><option>Loading...</option></select></font>";
}
if(xmlHttp.readyState==4)
{
//alert(xmlHttp.responseText);
document.frmSelect.make.disabled=false;
document.getElementById('make1').innerHTML=xmlHttp.responseText;
}

}
function disp_model()
   {
   var w = document.frmSelect.make.selectedIndex;
   var selected_text = document.frmSelect.make.options[w].text;
   //alert(selected_text);
    var w1 = document.frmSelect.mylist.selectedIndex;
   var selected_text1 = document.frmSelect.mylist.options[w1].text;
   //alert(selected_text1);

//var value=document.frmSelect.new_used.value;

//alert("hi");
//alert(value);
//document.frmSelect.make.disabled=false;
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  }
var url="getcars.php?type="+selected_text1+"&make="+selected_text;
xmlHttp.onreadystatechange=adminmodel;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}

function adminmodel()
{
if(xmlHttp.readyState!=4)
{
document.frmSelect.model.disabled=true;
document.getElementById('model1').innerHTML="<select name='model' disabled style='width: 110px; margin-left: 6px;'><option>Loading...</option></select></font>";
}
if(xmlHttp.readyState==4)
{
//alert(xmlHttp.responseText);
document.frmSelect.make.disabled=false;
document.getElementById('model1').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;
}