//Globals
var req;

function loadXMLDoc(url) {
	req = false;
	if(window.XMLHttpRequest){
		try { req = new XMLHttpRequest(); }
		catch(e) { req = false;	}
	} 
	else if(window.ActiveXObject) {
		try { req = new ActiveXObject("Msxml2.XMLHTTP"); }
		catch(e) {
			try { req = new ActiveXObject("Microsoft.XMLHTTP");	}
			catch(e) { req = false; }
		}
	}
	if(req) {
		req.onreadystatechange = processReqChange;
		req.open("GET", url, true);
		req.send("");
	}
}	

function processReqChange(){
	if (req.readyState == 4){
		if (req.status == 200){	
			processXMLReponse(req.responseXML);
		}else{
			alert("There was a problem processing the command:\n" + req.statusText);
		}
	}
}

// Core function that handles the reponses
function processXMLReponse(xmldoc){
	//Populate Lists
	var node_list;
	var select;
	
	// Makes
	UpdateList(xmldoc, "MAKE", "SelectMake", "Any Make");
	
	// Models
	UpdateList(xmldoc, "MODEL", "SelectModel", "Any Model");
	
	// Exterior Colors
	UpdateList(xmldoc, "COLOR", "SelectColor", "Any Color");
	
	// Trim
	UpdateList(xmldoc, "TRIM", "SelectTrim", "Any Trim");
	
	// BodyStyles
	UpdateList(xmldoc, "BODYSTYLE", "SelectBody", "Any Body");

	// Fuel type
	if($j("#SelectFuelType").length){
		UpdateList(xmldoc, "FUELTYPE", "SelectFuelType", "Any Fuel Type");
	}
	
	// Transmission
	if($j("#SelectTransmission").length){
		UpdateList(xmldoc, "TRANSMISSION", "SelectTransmission", "Any Transmission");
	}
	
	UpdateMilesList(xmldoc, "SelectMileage");
	
	// Years
	UpdateYearList(xmldoc, "SelectYearMin");
	UpdateYearList(xmldoc, "SelectYearMax");
	
	// Price Range
	UpdatePriceList(xmldoc, "SelectPriceMin");
	UpdatePriceList(xmldoc, "SelectPriceMax");

	//Drive Train
	UpdateList(xmldoc, "DRIVETRAIN", "SelectDriveTrain", "Any DriveTrain");

	//Location
	if ($j("#SelectLocation").length) {
		UpdateList(xmldoc, "LOCATION", "SelectLocation", "Any Location");
	}

	UpdateVehiclesFound(xmldoc, "MATCHES", "spanVehiclesFoundTotal");
}
	
function UpdateYearList(xmldoc, selectBoxName){

	var select = document.getElementById(selectBoxName);
	var counter = 1;
	var minyear;
	var maxyear;
	
	if (xmldoc.getElementsByTagName("MINYEAR").item(0).firstChild != null && xmldoc.getElementsByTagName("MAXYEAR").item(0).firstChild.nodeValue != null){
		minyear = xmldoc.getElementsByTagName("MINYEAR").item(0).firstChild.nodeValue;
		maxyear = xmldoc.getElementsByTagName("MAXYEAR").item(0).firstChild.nodeValue;
	}
	
	// Store Past Value
	var stored_value;
	
	if(document.getElementById("stack").value.match("year") != null){
		if(select.selectedIndex != -1){
			stored_value = select.options[select.selectedIndex].value;
		}
	}
	
	// Clear List
	while (select.length > 0){
		select.remove(0);
	}
	
	// Repopulate
	select.options[0] = new Option("Any", "Any");
	var counter = 1;
	
	// Check to see if either list should be restricted.
	if (selectBoxName == "SelectYearMin"){
		// See if there is a current value for selectmaxyear...
		if(document.getElementById("SelectYearMax").value != "" && document.getElementById("SelectYearMax").value != "Any"){
			maxyear = document.getElementById("SelectYearMax").value;
		}   
	}
	
	if (selectBoxName == "SelectYearMax"){
		// See if there is a current value for selectmaxyear...
		if(document.getElementById("SelectYearMin").value != "" && document.getElementById("SelectYearMin").value != "Any"){
			minyear = document.getElementById("SelectYearMin").value;
		}   
	}
			
	for (var i = minyear; i <= maxyear; i++){
		select.options[counter] = new Option(i,i);
		counter++;
	}		
	// Reselect
	for (var i = 0; i < select.options.length; i ++){
		option_value = select.options[i].value;
		if(option_value == stored_value){
			select.selectedIndex = i;
		}
	}
	
}

function UpdateMilesList(xmldoc, selectBoxName){

	var select = document.getElementById(selectBoxName);
	var counter = 1;
	
	var minmiles;
	var maxmiles;
	
	if (xmldoc.getElementsByTagName("MINMILES").item(0).firstChild != null && xmldoc.getElementsByTagName("MAXMILES").item(0).firstChild.nodeValue != null){
		minmiles = xmldoc.getElementsByTagName("MINMILES").item(0).firstChild.nodeValue;
		maxmiles = xmldoc.getElementsByTagName("MAXMILES").item(0).firstChild.nodeValue;
	}
	
	// Store Past Value
	var stored_value;
	
	if(document.getElementById("stack").value.match("miles") != null){
		if(select.selectedIndex != -1){
			stored_value = select.options[select.selectedIndex].value;
		}
	}
	
	// Clear List
	while (select.length > 0){
		select.remove(0);
	}
	
	// Repopulate
	select.options[0] = new Option("Any", "Any");
	var counter = 1;
	
	if (minmiles <= 5000 && maxmiles >= 0){
		select.options[counter] = new Option("5,000",5000);
		counter++;
	}
	if (minmiles <= 10000 && maxmiles > 5000){
		select.options[counter] = new Option("10,000",10000);
		counter++;
	}
	if (minmiles <= 25000 && maxmiles > 10000){
		select.options[counter] = new Option("25,000",25000);
		counter++;
	}
	if (minmiles <= 50000 && maxmiles > 25000){
		select.options[counter] = new Option("50,000",50000);
		counter++;
	}
	if (minmiles <= 75000 && maxmiles > 50000){
		select.options[counter] = new Option("75,000",75000);
		counter++;
	}
	if (minmiles <= 100000 && maxmiles > 75000){
		select.options[counter] = new Option("100,000",100000);
		counter++;
	}
	if (minmiles <= 150000 && maxmiles > 100000){
		select.options[counter] = new Option("150,000",150000);
		counter++;
	}
			
	// Reselect
	for (var i = 0; i < select.options.length; i ++){
		option_value = select.options[i].value;
		if(option_value == stored_value){
			select.selectedIndex = i;
		}
	}
	
}

function UpdatePriceList(xmldoc, selectBoxName) {

	var select = document.getElementById(selectBoxName);
	var counter = 1;
	
	var minprice;
	var maxprice;
	
	if (xmldoc.getElementsByTagName("MINPRICE").item(0).firstChild != null && xmldoc.getElementsByTagName("MAXPRICE").item(0).firstChild.nodeValue != null){
		minprice = xmldoc.getElementsByTagName("MINPRICE").item(0).firstChild.nodeValue;
		maxprice = xmldoc.getElementsByTagName("MAXPRICE").item(0).firstChild.nodeValue;
	}
	
	// Store Past Value
	var stored_value;
	
	if(document.getElementById("stack").value.match("price") != null){
		if(select.selectedIndex != -1){
			stored_value = select.options[select.selectedIndex].value;
		}
	}
	
	// Clear List
	while (select.length > 0) {
		select.remove(0);
	}
	
	// Repopulate
	select.options[0] = new Option("Any", "Any");
	var counter = 1;
	
	// Check to see if either list should be restricted.
	if (selectBoxName == "SelectPriceMin"){
		// See if there is a current value for selectmaxyear...
		if(document.getElementById("SelectPriceMax").value != "" && document.getElementById("SelectPriceMax").value != "Any"){
			maxprice = document.getElementById("SelectPriceMax").value - 2;
		}   
	}
	
	if (selectBoxName == "SelectPriceMax"){
		// See if there is a current value for selectmaxyear...
		if(document.getElementById("SelectPriceMin").value != "" && document.getElementById("SelectPriceMin").value != "Any"){
			minprice = document.getElementById("SelectPriceMin").value;
		}   
	}

	if (minprice <= 4999)
	{
		select.options[counter] = new Option("$0",4999);
		counter++;
	}
	if (minprice <= 9999 && maxprice >= 0)
	{
		select.options[counter] = new Option("$5,000",5000);
		counter++;
	}		
	if (minprice <= 14999 && maxprice >= 5000)
	{
		select.options[counter] = new Option("$10,000",10000);
		counter++;
	}
	if (minprice <= 19999 && maxprice >= 10000)
	{
		select.options[counter] = new Option("$15,000",15000);
		counter++;
	}
	if (minprice <= 24999 && maxprice >= 15000)
	{
		select.options[counter] = new Option("$20,000",20000);
		counter++;
	}
	if (minprice <= 29999 && maxprice >= 20000)
	{
		select.options[counter] = new Option("$25,000",25000);
		counter++;
	}
	if (minprice <= 34999 && maxprice >= 25000)
	{
		select.options[counter] = new Option("$30,000",30000);
		counter++;
	}
	if (minprice <= 39999 && maxprice >= 30000)
	{
		select.options[counter] = new Option("$35,000",35000);
		counter++;
	}
	if (minprice <= 44999 && maxprice >= 35000)
	{
		select.options[counter] = new Option("$40,000",40000);
		counter++;
	}
	if (minprice <= 39999 && maxprice >= 40000)
	{
		select.options[counter] = new Option("$45,000",45000);
		counter++;
	}
	if (minprice <= 44999 && maxprice >= 45000)
	{
		select.options[counter] = new Option("$50,000",50000);
		counter++;
	}		        			        		        		        
	if (minprice <= 49999 && maxprice >= 50000)
	{
		select.options[counter] = new Option("$55,000",55000);
		counter++;
	}
	if (minprice <= 54999 && maxprice >= 55000)
	{
		select.options[counter] = new Option("$60,000",60000);
		counter++;
	}
	if (minprice <= 59999 && maxprice >= 60000)
	{
		select.options[counter] = new Option("$65,000",65000);
		counter++;
	}
	if (minprice <= 64999 && maxprice >= 65000)
	{
		select.options[counter] = new Option("$70,000",70000);
		counter++;
	}
	if (minprice <= 99999 && maxprice >= 70000)
	{
		select.options[counter] = new Option("$75,000",75000);
		counter++;
	}		        		        
	if (maxprice >= 75000)
	{
		select.options[counter] = new Option("$100000+",100000);
		counter++;
	}

	// Reselect
	for (var i = 0; i < select.options.length; i ++){
		option_value = select.options[i].value;
		if(option_value == stored_value){
			select.selectedIndex = i;
		}
	}
}

function init()
{
	var type = "both";
	if( $j('#tab_search_advanced_content').find('input[name="type"]:checked').length > 0 )
		type = $j('#tab_search_advanced_content').find('input[name="type"]:checked').val();
	loadXMLDoc("models.asp?type=" + type + "&stack=");
}

function ParamsChanged(type) 
{

	cur_stack = document.getElementById("stack").value;
	new_stack = "";
	
	if (cur_stack.match(type) != null){
		new_stack = cur_stack.substring(0,cur_stack.indexOf(type) + type.length);
	}else{
		if (cur_stack != ""){
			new_stack = cur_stack + ",";
		}
		new_stack = new_stack + type;
	}

	document.getElementById("stack").value = new_stack;
				
	var params = "";
	
	// find what type is checked
	params = "type=" + $j('#tab_search_advanced_content').find('input[name="type"]:checked').val() + "&stack=" + new_stack;
	
	var l_make;
	var l_model;
	var l_color;
	var l_trim;
	var l_miles;
	var l_yearmin;
	var l_yearmax;
	var l_pricemin;
	var l_pricemax;
	var l_bodystyle = "";
	var l_drivetrain = "";
	var l_location = "";
	
	if(document.getElementById("SelectMake").selectedIndex != -1){
		l_make = document.getElementById("SelectMake").options[document.getElementById("SelectMake").selectedIndex].value;
		params += "&make=" + l_make;
	}
	
	if(document.getElementById("SelectModel").selectedIndex != -1){
		l_model = document.getElementById("SelectModel").options[document.getElementById("SelectModel").selectedIndex].value;
		params += "&model=" + l_model;
	}
	
	if(document.getElementById("SelectColor").selectedIndex != -1){
		l_color = document.getElementById("SelectColor").options[document.getElementById("SelectColor").selectedIndex].value;
		params += "&color=" + l_color;
	}
	
	if(document.getElementById("SelectTrim").selectedIndex != -1){
		l_trim = document.getElementById("SelectTrim").options[document.getElementById("SelectTrim").selectedIndex].value;
		params += "&trim=" + l_trim;
	}

	if(document.getElementById("SelectMileage").selectedIndex != -1){
		l_miles = document.getElementById("SelectMileage").options[document.getElementById("SelectMileage").selectedIndex].value;
		params += "&mileage=" + l_miles;
	}
	
	if(document.getElementById("SelectYearMin").selectedIndex != -1){
		l_yearmin = document.getElementById("SelectYearMin").options[document.getElementById("SelectYearMin").selectedIndex].value;
		params += "&yearmin=" + l_yearmin;
	}
	
	if(document.getElementById("SelectYearMax").selectedIndex != -1){
		l_yearmax = document.getElementById("SelectYearMax").options[document.getElementById("SelectYearMax").selectedIndex].value;
		params += "&yearmax=" + l_yearmax;
	}
	
	if(document.getElementById("SelectPriceMin").selectedIndex != -1){
		l_pricemin = document.getElementById("SelectPriceMin").options[document.getElementById("SelectPriceMin").selectedIndex].value;
		if (l_pricemin == "4999"){
			l_pricemin = "0";
		}
		params += "&pricemin=" + l_pricemin;
	}
	
	if(document.getElementById("SelectPriceMax").selectedIndex != -1){
		l_pricemax = document.getElementById("SelectPriceMax").options[document.getElementById("SelectPriceMax").selectedIndex].value;
		params += "&pricemax=" + l_pricemax;
	}
	
	if(document.getElementById("SelectBody").selectedIndex != -1){
		l_body = document.getElementById("SelectBody").options[document.getElementById("SelectBody").selectedIndex].value;
		params += "&bodystyle=" + l_body;
	}
	
	if($j("#SelectFuelType").length){
		if(document.getElementById("SelectFuelType").selectedIndex != -1){
			l_body = document.getElementById("SelectFuelType").options[document.getElementById("SelectFuelType").selectedIndex].value;
			params += "&fueltype=" + l_body;
		}
	}
	
	if($j("#SelectTransmission").length){
		if(document.getElementById("SelectTransmission").selectedIndex != -1){
			l_body = document.getElementById("SelectTransmission").options[document.getElementById("SelectTransmission").selectedIndex].value;
			params += "&transmission=" + l_body;
		}
	}

	if (document.getElementById("SelectDriveTrain").selectedIndex != -1) {
		l_drivetrain = document.getElementById("SelectDriveTrain").options[document.getElementById("SelectDriveTrain").selectedIndex].value;
		params += "&drivetrain=" + l_drivetrain;
	}
	
	if ($j("#SelectLocation").length) {
		if (document.getElementById("SelectLocation").selectedIndex != -1) {
			l_location = document.getElementById("SelectLocation").options[document.getElementById("SelectLocation").selectedIndex].value;
			params += "&location=" + l_location;
		}
	}
	
	//alert("models.asp?" + params);
	document.getElementById("params").value = params;
	
	// Get the results for the given parameters
	loadXMLDoc("models.asp?" + params); 
}

function PostSearch() {

	// Create the parameters
	var params = "view_detailed/";
	var l_type;
	var l_make;
	var l_model;
	var l_color;
	var l_trim;
	var l_miles;
	var l_yearmin;
	var l_yearmax;
	var l_pricemin;
	var l_pricemax;
	var l_bodystyle;
	var l_fueltype;
	var l_transmission;
	
	var l_certified;
	var l_carfax;
	var l_drivetrain;
	var l_location;
	
	l_type = $j('#tab_search_advanced_content').find('input[name="type"]:checked').val();
	if ( l_type ) {
		params += "type_" + l_type + "/";
	} 
	
	var advSearch = $j("#tab_search_advanced_content");
	if (advSearch.find("input[name=advanced-stock]").length) {
		if (advSearch.find("input[name=advanced-stock]").val().length) {
			location.href = 'browse/' + params + "stock_"+advSearch.find("input[name=advanced-stock]").val()+"/";
			return;
		}
	}
	
	if (advSearch.find("input[name=advanced-modelnumber]").length) {
		if (advSearch.find("input[name=advanced-modelnumber]").val().length) {
			location.href = 'browse/' + params + "modelnumber_"+advSearch.find("input[name=advanced-modelnumber]").val()+"/";
			return;
		}
	}
	
	if(document.getElementById("SelectMake").selectedIndex != -1){
		l_make = document.getElementById("SelectMake").options[document.getElementById("SelectMake").selectedIndex].value;
		if (l_make != "Any" && l_make){
			params += "make_" + l_make + "/";
		}
	}
	if(document.getElementById("SelectModel").selectedIndex != -1){
		l_model = document.getElementById("SelectModel").options[document.getElementById("SelectModel").selectedIndex].value;
		if (l_model != "Any" && l_model){
			params += "model_" + l_model + "/";
		}
	}
	
	if(document.getElementById("SelectTrim").selectedIndex != -1){
		l_trim = document.getElementById("SelectTrim").options[document.getElementById("SelectTrim").selectedIndex].value;
		if (l_trim != "Any" && l_trim){
			params += "trim_" + l_trim + "/";
		}
	}
	
	if(document.getElementById("SelectMileage").selectedIndex != -1){
		l_miles = document.getElementById("SelectMileage").options[document.getElementById("SelectMileage").selectedIndex].value;
		if (l_miles != "Any" && l_miles){
			params += "mileage_" + l_miles + "/";
		}
	}
	
	if(document.getElementById("SelectColor").selectedIndex != -1){
		l_color = document.getElementById("SelectColor").options[document.getElementById("SelectColor").selectedIndex].value;
		if (l_color != "Any" && l_color){
			params += "extcolor_" + SpaceToUscore(l_color) + "/"; // want to leave special chars like ampersands in place as literal
		}
	}
	if(document.getElementById("SelectYearMin").selectedIndex != -1){
		l_yearmin = document.getElementById("SelectYearMin").options[document.getElementById("SelectYearMin").selectedIndex].value;
		if (l_yearmin == "Any" && l_yearmin){
			l_yearmin = "0";
		}
	}
	if(document.getElementById("SelectYearMax").selectedIndex != -1){
		l_yearmax = document.getElementById("SelectYearMax").options[document.getElementById("SelectYearMax").selectedIndex].value;
		if (l_yearmax == "Any" && l_yearmax){
			if (l_yearmin != "0"){
			l_yearmax = "2009";
			params += "year_" + l_yearmin + "_" + l_yearmax + "/"
			}
		}
		else {
			params += "year_" + l_yearmin + "_" + l_yearmax + "/"
		}
	}
	if(document.getElementById("SelectPriceMin").selectedIndex != -1)
	{
		l_pricemin = document.getElementById("SelectPriceMin").options[document.getElementById("SelectPriceMin").selectedIndex].value;
		if (l_pricemin == "Any" && l_pricemin)
		{
			l_pricemin = "0";
		}
	}
	if(document.getElementById("SelectPriceMax").selectedIndex != -1)
	{
		l_pricemax = document.getElementById("SelectPriceMax").options[document.getElementById("SelectPriceMax").selectedIndex].value;
		if (l_pricemax == "Any" && l_pricemax){
			if(l_pricemin != "0"){
				l_pricemax = "50000";
				params += "price_" + l_pricemin + "_" + l_pricemax + "/"
			}
		}
		else {
			params += "price_" + l_pricemin + "_" + l_pricemax + "/"
		}
	}
	if(document.getElementById("SelectBody").selectedIndex != -1){
		l_bodystyle = document.getElementById("SelectBody").options[document.getElementById("SelectBody").selectedIndex].value;
		if (l_bodystyle != "Any" && l_bodystyle){
			params += "body_" + l_bodystyle + "/";
		}
	}
	
	if($j("#SelectFuelType").length){
		if(document.getElementById("SelectFuelType").selectedIndex != -1){
			l_fueltype = document.getElementById("SelectFuelType").options[document.getElementById("SelectFuelType").selectedIndex].value;
			if (l_fueltype != "Any" && l_fueltype){
				params += "fuel_" + l_fueltype + "/";
			}
		}
	}
	
	if($j("#SelectTransmission").length){
		if(document.getElementById("SelectTransmission").selectedIndex != -1){
			l_transmission = document.getElementById("SelectTransmission").options[document.getElementById("SelectTransmission").selectedIndex].value;
			if (l_transmission != "Any" && l_transmission){
				params += "trans_" + l_transmission + "/";
			}
		}
	}
	
	if( $j('#advanced_search_certified').length > 0 ){
		if(document.getElementById('advanced_search_certified').checked == true) {
			params += "certified_true/";
		}
	}
	
	if( $j('#advanced_search_carfax').length > 0 ){
		if(document.getElementById('advanced_search_carfax').checked == true) {
			params += "carfax_true/";
		}
	}

	if (document.getElementById("SelectDriveTrain").selectedIndex != -1) {
		l_drivetrain = document.getElementById("SelectDriveTrain").options[document.getElementById("SelectDriveTrain").selectedIndex].value;
		if (l_drivetrain != "Any" && l_drivetrain) {
			params += "drivetrain_" + l_drivetrain + "/";
		}
	}
	
	if ($j("#SelectLocation").length) {
		if (document.getElementById("SelectLocation").selectedIndex != -1) {
			l_location = document.getElementById("SelectLocation").options[document.getElementById("SelectLocation").selectedIndex].value;
			if (l_location != "Any" && l_location) {
				params += "location_" + l_location + "/";
			}
		}
	}
	
	params = escapeForSearch(params);
	
	location.href = 'browse/' + params;
}	

function UpdateFront(xmldoc, tagName, selectBoxName, default_option){
	UpdateSearchField(xmldoc, tagName, selectBoxName, default_option, "front-stack");
}

function UpdateList(xmldoc, tagName, selectBoxName, default_option){
	UpdateSearchField(xmldoc, tagName, selectBoxName, default_option, "stack");
}

function UpdateVehiclesFound(xmldoc, tagName, divBoxName) {
	var node_list = xmldoc.getElementsByTagName(tagName);
	var val = node_list.item(0).getAttribute("count");
	var div = document.getElementById(divBoxName);
	div.innerHTML =  val;
}



function UpdateSearchField(xmldoc, tagName, selectBoxName, default_option, stackId){

	var node_list = xmldoc.getElementsByTagName(tagName);
	var select = document.getElementById(selectBoxName);
	var counter = 1;
	
	// Store Past Value (only retain the value if the item is in the stack)
	var stored_value;
	
	if(document.getElementById(stackId).value.match(tagName.toLowerCase()) != null){
		//alert(tagName + " in stack, reselecting " + document.getElementById("stack").value.match(tagName.toLowerCase()));
		if(select.selectedIndex != -1){
			stored_value = select.options[select.selectedIndex].value;
		}
	}
	
	// Clear List
	while (select.length > 0){
		select.remove(0);
	}
	
	// Repopulate
	select.options[0] = new Option(default_option, "");
	for (var i = 0; i < node_list.length; i++){
		if(node_list.item(i).firstChild != null){
			option_value = node_list.item(i).firstChild.nodeValue
			
			select.options[counter] = new Option(unescape(option_value.replace(/\+/g,' ')), option_value);
			counter++;
		}
	}
	
	// Reselect
	for (var i = 0; i < select.options.length; i ++){
		option_value = select.options[i].value;
		//alert(option_value + " - " + stored_value);
		if(option_value == stored_value){
			select.selectedIndex = i;
		}
	}
}