var URL = window.location.href;
var index = URL.indexOf("/",8);
if ( index != -1 ) URL = URL.substring(0,index).concat("/location_vacances/xhr.php");
else URL = URL.concat("/location_vacances/xhr.php");

var XHR_IDS = ['Msxml2.XMLHTTP', 'Microsoft.XMLHTTP', 'Msxml2.XMLHTTP.4.0'];

function getXHR(){
  var xhr = null;
	// FF, safari, opera
  try{
			xhr = new XMLHttpRequest();
	}catch(e){}
	// IE
  if( !xhr ){
    for( var i = 0; i < 3; i++ ){
      var id = XHR_IDS[i];
      try{
      		xhr = new ActiveXObject(id);
      }catch(e){}
      if( xhr ){
          XHR_IDS = [id];// so faster next time
          break;
      }
    }
  }
  if( !xhr ){
  	alert("XMLHTTP not available");
  }
	return xhr;
}

function sendRequest(params,callback){
	var xhr = getXHR();
	if( !xhr ) return;
	xhr.open("POST",URL,true);
	xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
	xhr.onreadystatechange = function(){
		if( xhr.readyState == 4 ){
			if( xhr.status == 200 ){
				var html = xhr.responseText;
				callback(html);
			}
			else alert("Service unavailable");
		}
	}
	params = params.concat("&lang=en");
	xhr.send(params);
}

function onChangePays(){
	getRegions();
	searchAnnonce();
	getDepartements();
}
function onChangeRegion(){
	getDepartements();
	searchAnnonce();
	getCommunes();
}
function onChangeDepartement(){
	getCommunes();
	searchAnnonce();
}
function onChangeVille(){
	searchAnnonce();
}


function getRegions(){
	if( !document.recherche.destination || document.recherche.destination.value == "" ) return;
	
	clearRegion();
	clearDepartement();
	clearCommune();
	
	loading(document.getElementById("selectRegion"));

	var params = "&action=getregions&destination=".concat(document.recherche.destination.value);
	sendRequest(params,onRegionsLoaded);
}

function getCommunes(){
	if( !document.recherche.departement || document.recherche.departement.value == "" ) return;

	clearCommune();

	loading(document.getElementById("selectCommune"));

	var params = "&action=getcommuneswithannonce&destination=".concat(document.recherche.destination.value,"&region=",document.recherche.region.value,"&departement=",document.recherche.departement.value);
	sendRequest(params,onCommunesLoaded);
}

function getDepartements(){
	//if( document.recherche.region.value == "" ) return;
	
	clearDepartement();
	clearCommune();

	loading(document.getElementById("selectDepartement"));

	var params = "&action=getdepartements&destination=".concat(document.recherche.destination.value,"&region=",document.recherche.region.value);
	sendRequest(params,onDepartementsLoaded);
}

function onRegionsLoaded(html){
	var node = document.getElementById("selectRegion");
	node.innerHTML = html;
	document.recherche.region.focus();
}

function onCommunesLoaded(html){
	var node = document.getElementById("selectCommune");
	node.innerHTML = html;
	document.recherche.ville.focus();
}

function onDepartementsLoaded(html){
	var node = document.getElementById("selectDepartement");
	node.innerHTML = html;
	document.recherche.departement.focus();
}


function clearRegion(){
	document.recherche.region.selectedIndex = 0;
	for ( var i = document.recherche.region.options.length - 1; i > 0; i-- ){
			document.recherche.region.remove(i);
	}
}
function clearDepartement(){
	document.recherche.departement.selectedIndex = 0;
	for ( var i = document.recherche.departement.options.length - 1; i > 0; i-- ){
			document.recherche.departement.remove(i);
	}
}
function clearCommune(){
	document.recherche.ville.selectedIndex = 0;
	for ( var i = document.recherche.ville.options.length - 1; i > 0; i-- ){
			document.recherche.ville.remove(i);
	}
}

function initSearch(){
	document.getElementById("accueil").style.display = "none";
	document.getElementById("searchresult").innerHTML = ""
	document.getElementById("searchloading").style.display = "block";
	document.getElementById("search").style.display = "block";
}
function searchAnnonce(page){
	initSearch();
	if ( !page ) page = 0;
	
	var params = "&action=search&lang=".concat(document.recherche.lang.value,"&pge=",page,"&destination=",document.recherche.destination.value,"&hebergement=",document.recherche.hebergement.value,"&situation=",document.recherche.situation.value,"&nbp=",document.recherche.nbp.value,"&trier=",document.recherche.trier.value);
	if ( document.recherche.region ){
		params = params.concat("&region=",document.recherche.region.value);
	}
	if ( document.recherche.departement ){
		params = params.concat("&departement=",document.recherche.departement.value);
	}
	if ( document.recherche.ville ){
		params = params.concat("&ville=",document.recherche.ville.value);
	}
	if ( document.recherche.hcp.checked ){
		 params = params.concat("&hcp=",document.recherche.hcp.value);
	}
	if ( document.recherche.animalOUI.checked ){
		 params = params.concat("&animalOUI=",document.recherche.animalOUI.value);
	}
	if ( document.recherche.piscine.checked ){
		 params = params.concat("&piscine=",document.recherche.piscine.value);
	}
	if ( document.recherche.trier ){
		 params = params.concat("&trier=",document.recherche.trier.value);
	}	
	sendRequest(params,onResultLoaded);
}
function searchMer(){
	initSearch();
	var params = "&action=search&lang=".concat(document.recherche.lang.value,"&destination=france&situation=Mer");
	sendRequest(params,onResultLoaded);
}
function searchVille(){
	initSearch();
	var params = "&action=search&lang=".concat(document.recherche.lang.value,"&destination=france&situation=Ville");
	sendRequest(params,onResultLoaded);
}
function searchMontagne(){
	initSearch();
	var params = "&action=search&lang=".concat(document.recherche.lang.value,"&destination=france&situation=Montagne");
	sendRequest(params,onResultLoaded);
}
function searchCampagne(){
	initSearch();
	var params = "&action=search&lang=".concat(document.recherche.lang.value,"&destination=france&situation=Campagne");
	sendRequest(params,onResultLoaded);
}
function onResultLoaded(html){
	document.getElementById("searchloading").style.display = "none";
	document.getElementById("searchresult").innerHTML = html;
}