var xmlHttp_index

function GetXmlHttpObject_index()
{
var xmlHttp_index=null;
try
  {
  // Firefox, Opera 8.0+, Safari
  xmlHttp_index=new XMLHttpRequest();
  }
catch (e)
  {
  // Internet Explorer
  try
    {
    xmlHttp_index=new ActiveXObject("Msxml2.XMLHTTP");
    }
  catch (e)
    {
    xmlHttp_index=new ActiveXObject("Microsoft.XMLHTTP");
    }
  }
return xmlHttp_index;
}


function getInitYears_index()
{ 
xmlHttp_index=GetXmlHttpObject_index();
if (xmlHttp_index==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 
  
var url;
if(Get_Cookie_index('yearselect')) {
url="/getyears_index.aspx?year="+Get_Cookie_index('yearselect');
} else {
url="/getyears_index.aspx";
}
xmlHttp_index.onreadystatechange=stateChanged_index;
xmlHttp_index.open("GET",url,true);
xmlHttp_index.send(null);
}


function stateChanged_index() 
{ 
if (xmlHttp_index.readyState==4)
{ 
document.getElementById("txtYears_index").innerHTML=xmlHttp_index.responseText;
}
}



function getInitMakes_index()
{
xmlHttpMakes_index=GetXmlHttpObject_index();
if (xmlHttpMakes_index==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 
var url;
if(Get_Cookie_index('yearselect')) {
url="/getmakes_index.aspx?year="+Get_Cookie_index('yearselect')+"&make="+Get_Cookie_index('makeselect');
} else {
url="/getmakes_index.aspx?year=";
}
xmlHttpMakes_index.onreadystatechange=stateChangedMakes_index;
xmlHttpMakes_index.open("GET",url,true);
xmlHttpMakes_index.send(null);
}

function getMakes_index()
{
cookiedelete_index();
document.getElementById('make_id').disabled = true;
document.getElementById('model_id').disabled = true;
getInitModels_index();
var selYearIndex = document.getElementById('year_id').selectedIndex;
var selYearValue = document.getElementById('year_id')[selYearIndex].value;

xmlHttpMakes_index=GetXmlHttpObject_index();
if (xmlHttpMakes_index==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 
var url="/getmakes_index.aspx";
url=url+"?year="+selYearValue;
xmlHttpMakes_index.onreadystatechange=stateChangedMakes_index;
xmlHttpMakes_index.open("GET",url,true);
xmlHttpMakes_index.send(null);
}

function stateChangedMakes_index() 
{ 
if (xmlHttpMakes_index.readyState==4)
{ 
document.getElementById("txtMakes_index").innerHTML=xmlHttpMakes_index.responseText;
}
}



function getInitModels_index()
{
xmlHttpModels_index=GetXmlHttpObject_index();
if (xmlHttpModels_index==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 
var url;
if(Get_Cookie_index('yearselect')) {
url="/getmodels_index.aspx?year="+Get_Cookie_index('yearselect')+"&make="+Get_Cookie_index('makeselect')+"&model="+Get_Cookie_index('modelselect');
} else {
url="/getmodels_index.aspx?year=&make=";
}
xmlHttpModels_index.onreadystatechange=stateChangedModels_index;
xmlHttpModels_index.open("GET",url,true);
xmlHttpModels_index.send(null);
}

function getModels_index()
{
cookiedelete_index();
var selYearIndex = document.getElementById('year_id').selectedIndex;
var selYearValue = document.getElementById('year_id')[selYearIndex].value;
var selMakeIndex = document.getElementById('make_id').selectedIndex;
var selMakeValue = document.getElementById('make_id')[selMakeIndex].value;

xmlHttpModels_index=GetXmlHttpObject_index();
if (xmlHttpModels_index==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 
var url="/getmodels_index.aspx";
url=url+"?year="+selYearValue;
url=url+"&make="+selMakeValue;
xmlHttpModels_index.onreadystatechange=stateChangedModels_index;
xmlHttpModels_index.open("GET",url,true);
xmlHttpModels_index.send(null);
}

function stateChangedModels_index() 
{ 
if (xmlHttpModels_index.readyState==4)
{ 
document.getElementById("txtModels_index").innerHTML=xmlHttpModels_index.responseText;
}
}



function ValidateMe_index(theForm)
{
  if (theForm.year.selectedIndex == 0)
  {
    alert("Please select a year");
    return (false);
  }   
  
  if (theForm.make.selectedIndex == 0)
  {
    alert("Please select a make");
    return (false);
  } 
  
  if (theForm.model.selectedIndex == 0)
  {
    alert("Please select a model");
    return (false);
  }  
  
  return(true);
}


function cookieme_index()
{
Set_Cookie('yearselect', chooser_index.year.value, '', '/', '', '' );
Set_Cookie('makeselect', chooser_index.make.value, '', '/', '', '' );
Set_Cookie('modelselect', chooser_index.model.value, '', '/', '', '' );

//alert(Get_Cookie_index('yearselect')+' '+Get_Cookie_index('makeselect')+' '+Get_Cookie_index('modelselect'))
}





function cookiedelete_index()
{
Delete_Cookie_index('yearselect', '/', '');
Delete_Cookie_index('makeselect', '/', '');
Delete_Cookie_index('modelselect', '/', '');
}

function Set_Cookie_index( name, value, expires, path, domain, secure ) 
{
// set time, it's in milliseconds
var today = new Date();
today.setTime( today.getTime() );

/*
if the expires variable is set, make the correct 
expires time, the current script below will set 
it for x number of days, to make it for hours, 
delete * 24, for minutes, delete * 60 * 24
*/
if ( expires )
{
expires = expires * 1000 * 60 * 60;
}
var expires_date = new Date( today.getTime() + (expires) );

document.cookie = name + "=" +escape( value ) +
( ( expires ) ? ";expires=" + expires_date.toGMTString() : "" ) + 
( ( path ) ? ";path=" + path : "" ) + 
( ( domain ) ? ";domain=" + domain : "" ) +
( ( secure ) ? ";secure" : "" );
}

// this function gets the cookie, if it exists
function Get_Cookie_index( name ) {
	
var start = document.cookie.indexOf( name + "=" );
var len = start + name.length + 1;
if ( ( !start ) &&
( name != document.cookie.substring( 0, name.length ) ) )
{
return null;
}
if ( start == -1 ) return null;
var end = document.cookie.indexOf( ";", len );
if ( end == -1 ) end = document.cookie.length;
return unescape( document.cookie.substring( len, end ) );
}

// this deletes the cookie when called
function Delete_Cookie_index( name, path, domain ) {
if ( Get_Cookie_index( name ) ) document.cookie = name + "=" +
( ( path ) ? ";path=" + path : "") +
( ( domain ) ? ";domain=" + domain : "" ) +
";expires=Thu, 01-Jan-1970 00:00:01 GMT";
}