function f_clientWidth() {
    return f_filterResults (
	    window.innerWidth ? window.innerWidth : 0,
	    document.documentElement ? document.documentElement.clientWidth : 0,
	    document.body ? document.body.clientWidth : 0
    );
  }
  function f_clientHeight() {
    return f_filterResults (
	    window.innerHeight ? window.innerHeight : 0,
	    document.documentElement ? document.documentElement.clientHeight : 0,
	    document.body ? document.body.clientHeight : 0
    );
  }
  function f_scrollLeft() {
    return f_filterResults (
	    window.pageXOffset ? window.pageXOffset : 0,
	    document.documentElement ? document.documentElement.scrollLeft : 0,
	    document.body ? document.body.scrollLeft : 0
    );
  }
  function f_scrollTop() {
    return f_filterResults (
	    window.pageYOffset ? window.pageYOffset : 0,
	    document.documentElement ? document.documentElement.scrollTop : 0,
	    document.body ? document.body.scrollTop : 0
    );
  }
  function f_filterResults(n_win, n_docel, n_body) {
    var n_result = n_win ? n_win : 0;
    if (n_docel && (!n_result || (n_result > n_docel)))
	    n_result = n_docel;
    return n_body && (!n_result || (n_result > n_body)) ? n_body : n_result;
  }
  // AJAX
  var XMLHttpFactories = [
    function () {return new XMLHttpRequest()},
    function () {return new ActiveXObject("Msxml2.XMLHTTP")},
    function () {return new ActiveXObject("Msxml3.XMLHTTP")},
    function () {return new ActiveXObject("Microsoft.XMLHTTP")}
  ];
  function createXMLHTTPObject() {
    var xmlhttp = false;
    for (var i=0;i<XMLHttpFactories.length;i++) {
      try {
	xmlhttp = XMLHttpFactories[i]();
      }
      catch (e) {
	continue;
      }
      break;
    }
    return xmlhttp;
  }
  var cartXMLHTTPObject = createXMLHTTPObject();
  function sendRequest(url,callback,postData) {
    if (!cartXMLHTTPObject) cartXMLHTTPObject = createXMLHTTPObject();
    if (!cartXMLHTTPObject) return;
    var method = (postData) ? "POST" : "GET";
    cartXMLHTTPObject.open(method,url,true);
    cartXMLHTTPObject.setRequestHeader('User-Agent','XMLHTTP/1.0');
    if (postData)
      cartXMLHTTPObject.setRequestHeader('Content-type','application/x-www-form-urlencoded');
    cartXMLHTTPObject.onreadystatechange = function () {

      if (cartXMLHTTPObject.readyState != 4) {
	return;
      }
      if (cartXMLHTTPObject.status != 200 && req.status != 304) {
	return;
      }
      callback(cartXMLHTTPObject);

    }
    if (cartXMLHTTPObject.readyState == 4) {
      return;
    }
    cartXMLHTTPObject.send(postData);
  }

  // Global cart variables
  var houses;
  var cartitems = new Array();
  var cartMen = 0;
  var cartWomen = 0;
  var months = new Array();
  var precartbox,precartform,cartbox,cartboxHTML,cartinfo,cartbutton_text,cartbutton;
  var cart_init = false;
  var current_cart_country = "";
months[1]='Jan';months[2]='Feb';months[3]='Mar';months[4]='Apr';months[5]='May';months[6]='Jun';months[7]='Jul';months[8]='Aug';months[9]='Sep';months[10]='Oct';months[11]='Nov';months[12]='Dec';      // cart functions
      function open_precartbox(e){
	if(!cart_init) return false;
	// if user clicks "book"-button
	if(document.getElementById("container").offsetWidth<=600) return false;
	var ie = document.all ? true : false;
	if(!precartbox){
	  precartbox = document.createElement("div");
	  document.body.appendChild(precartbox);
	}

	precartbox.setAttribute("id", "pre_cartbox");

	var u = ie ? e.clientY + document.documentElement.scrollTop : e.pageY;
	var l = ie ? e.clientX + document.documentElement.scrollLeft : e.pageX;
	var top = u + 25;
	var left = l - 200;
	if(left<3){
	  left=3;
	}else if(left+precartbox.offsetWidth>f_clientWidth()+f_scrollLeft()){
	  //left -= left+precartbox.offsetWidth-(f_clientWidth()+f_scrollLeft());
	  scroll(left+precartbox.offsetWidth-f_clientWidth(),f_scrollTop());
	}
	if(top<3){
	  top=3;
	}else if(top+precartbox.offsetHeight>f_clientHeight()+f_scrollTop()){
	  //top -= top+precartbox.offsetHeight-(f_clientHeight()+f_scrollTop());
	  scroll(f_scrollLeft(),top+precartbox.offsetHeight-f_clientHeight());
	}
	precartbox.style.top = top+'px';
	precartbox.style.left = left+'px';
	precartbox.innerHTML = '<div style="margin:10px 12px">\
	    <a href="javascript:close_precartbox();"><img style="float:right;margin-top:-2px;width:22px;height:21px;" title="Close" src="/imgfront/close_cart.png" width="22px" height="21px"></a>\
	    How do you want to proceed?\
	    <div style="height:14px;"></div>\
	    <div style="text-align:center;">\
	      <a style="width:167px;" class="cartbutton book_cart" href="javascript:add_form_to_cart(true);">\
		<span class="cartbutton_bg"><span class="cartbutton_text">Proceed to Booking</span></span>\
	      </a>\
	      <div style="height:12px;font-size:0px;"></div>\
	      <a style="width:167px;" class="cartbutton add_to_cart" href="javascript:add_form_to_cart(false);">\
		<span class="cartbutton_bg"><span class="cartbutton_text">Add to My Itinerary</span></span>\
	      </a>\
	    </div>\
	  </div>';
	return false;
      }
      function close_precartbox(){
	document.body.removeChild(precartbox);
	precartbox = null;
      }
      function set_precartform(f){
	// if user tries to submit form f
	if(document.getElementById("container").offsetWidth<=600) return true;
	precartform = f;
	return false;
      }
      function proceed_submit(){
	// if user clicks "proceed to booking"
	precartform.submit();
      }
      function add_form_to_cart(proceed_to_booking){
	// if user clicks "add to shopping cart"
	if(proceed_to_booking && cartitems.length==0){
	  precartform.submit();
	  return;
	}
	var stayAdded = false;
	with(precartform){
	  var day,month,year,nightsValue;
	  if(typeof(month_a)!="undefined"){
	    var monthString = month_a.value;
	    while (monthString.charAt(0)=='0' && monthString.length>1) monthString = monthString.substring(1,monthString.length);
	    month = parseInt(monthString) + 1;
	    nightsValue = nights.value;
	    day = day_a.value;
	    year = year_a.value;
	  }else{
	    var arr = new Date();
	    arr.setDate(arr.getDate()+1);
	    month = arr.getMonth()+1;
	    year = arr.getFullYear();
	    day = arr.getDate();
	    nightsValue = 1;
	  }
	  var date = year + "-" + month + "-" + day;
	  if(typeof(male)!="undefined") cartMen = parseInt(male.value);
	  if(typeof(female)!="undefined") cartWomen = parseInt(female.value);

	  if(isoverlapping(date,nightsValue)){
	    proceed_to_booking = proceed_to_booking && stayExists(house.value,nightsValue,date);
	    if(!proceed_to_booking){
	      alert("You have entered the same date for more than 1 hostel. Please review your dates to proceed.");
	    }
	  }else{
	    stayAdded = addStay(house.value,nightsValue,date);
	  }
	}

	close_precartbox();

	if(proceed_to_booking){
	  redrawCart();
	  document.cartform.submit();
	}
	scroll(0,0);

      }

      function initCart(){
	// when page loads
	houses = new Array();
	parseCartContent();
	cartbox = document.getElementById("cartbox");
	cartinfo = document.getElementById("cartinfo");
	cartbutton_text = document.getElementById("cartbutton_text");
	cartbutton = document.getElementById("cartbutton");
	cartboxHTML = cartbox.innerHTML;
	for(var i=0; i<cartitems.length; i++){
	  var checkDateArray = cartitems[i][2].split('-');
	  var checkarr = new Date(checkDateArray[0],checkDateArray[1]-1,checkDateArray[2]);
	  if(checkarr.getTime()<((new Date()).getTime()-2*86400000)){
	    deleteStay(i);
	  }
	}
	for(var i=0; i<cartitems.length; i++){
	  houses[cartitems[i][0]] = cartitems[i][0];
	}
	parseCartPersons();
	if(""!=readCartCookie()){
	  cartbox.style.display = "none";
	}
	getHouseNames();
	cart_init = true;
      }
      function getHouseNames(){
	var postData = "";
	parseCartContent();
	if(cartitems.length>0){
	  for(var i=0; i<cartitems.length; i++){
	    postData += "houses["+i+"]="+cartitems[i][0]+'&';
	  }
	  sendRequest("/dba/carthouses.php",houseNamesResponseHandler,postData);
	}
      }
      function houseNamesResponseHandler(req){
	writeHousesCookie(req.responseText);
	var housesArray = req.responseText.split('|');
	for(var i=0; i<housesArray.length; i++){
	  if(housesArray[i]>""){
	    houses[housesArray[i].split(',')[0]] = housesArray[i].split(',')[1];
	  }
	}
	redrawCart();
      }
      function redrawCart(){
	var htmlString = "";
	parseCartContent();
	htmlString = "";
	for(var i=0; i<cartitems.length; i++){
	  var cartitem = cartitems[i];
	  var house = cartitem[0];
	  var dateArray = cartitem[2].split('-');
	  var nights = parseInt(cartitem[1]);
	  var arr = new Date(dateArray[0],dateArray[1]-1,dateArray[2]);
	  var dep = new Date(arr.getTime()+(nights+0.5)*1000*86400);
	  var arrString = arr.getDate() + " " +  months[arr.getMonth()+1] + " " + arr.getFullYear();
	  var depString = dep.getDate() + " " +  months[dep.getMonth()+1] + " " + dep.getFullYear();
	  var itemId = 'cartitem'+(i);
	  var href = '/dba/hostel'+house+'.en.htm';
	  if(houses[house]!=house) htmlString += '<div class="cartitem" id="'+itemId+'"><a href="'+href+'">'+houses[house]+'</a> <a href="javascript:deleteStay('+(i)+');"><img title="Delete" src="/imgfront/delete.png"/></a><br>'+arrString+' - '+depString+' = '+nights+'</div>';
	  htmlString += '<input type="hidden" name="itinerary['+i+'][house]'+i+'" value="'+house+'">';
	  htmlString += '<input type="hidden" name="inp_nights['+i+']" value="'+nights+'">';
	  htmlString += '<input type="hidden" name="day_arrival['+i+']" value="'+arr.getDate()+'">';
	  htmlString += '<input type="hidden" name="month_arrival['+i+']" value="'+(arr.getMonth()+1)+'">';
	  htmlString += '<input type="hidden" name="year_arrival['+i+']" value="'+arr.getFullYear()+'">';
	}
	htmlString += '<input type="hidden" name="male" value="'+cartMen+'">';
	htmlString += '<input type="hidden" name="female" value="'+cartWomen+'">';
	if(cartitems.length>0){
	  cartinfo.style.display = "none";
          document.getElementById("cartitems").style.display="block";
	  cartbutton_text.innerHTML = "Proceed to Booking";
	  cartbutton.setAttribute("href", "javascript:document.cartform.submit();");
	}else{
	  cartinfo.style.display = "block";
          document.getElementById("cartitems").style.display="none";
	  cartbutton_text.innerHTML = "Search hostels";
	  cartbutton.setAttribute("href", "/web/hostels.en.htm");
	}
	if(cartbox.style.display != "block"){
	  cartbox.style.display = "block";
	}
	document.getElementById("cartitems").innerHTML = htmlString;
      }
      function addStay(house,nights,startdate){
	cartitems[cartitems.length] = Array(house,nights,startdate);
	sortCartItems();
	updateCartContent(cartitems);
	updateCartCountry(current_cart_country);
	document.cartform.country.value = current_cart_country;
	if(typeof(houses)!="undefined"){
	  if(typeof(houses[house])=="undefined") houses[house] = house;
	}
	getHouseNames();
	return true;
      }
      function stayExists(house,nights,startdate){
	for(var i=0; i<cartitems.length; i++){
	  if(cartitems[i][0]==house&&cartitems[i][1]==nights&&cartitems[i][2]==startdate)
	    return true;
	}
	return false;
      }
      function isoverlapping(checkstartdate,checknights){
	parseCartContent();
	var checkDateArray = checkstartdate.split('-');
	var checkarr = new Date(checkDateArray[0],checkDateArray[1]-1,checkDateArray[2]);
	var checkdep = new Date(checkarr.getTime()+(parseInt(checknights))*1000*86400);
	for(var i=0; i<cartitems.length; i++){
	  var cartitem = cartitems[i];
	  var dateArray = cartitem[2].split('-');
	  var nights = parseInt(cartitem[1]);
	  var arr = new Date(dateArray[0],dateArray[1]-1,dateArray[2]);
	  var dep = new Date(arr.getTime()+(nights)*1000*86400);
	  if((checkarr<=arr && checkdep>arr)||(checkarr>=arr && checkarr<dep)){
	    return true;
	  }
	}
	return false;
      }
      function deleteStay(stayid){
	for(var i=0; i<cartitems.length; i++){
	  if(i==stayid){
	    cartitems[i] = "";
	  }
	}
	updateCartContent(cartitems);
	redrawCart();
      }
      function sortCartItems(){
	if(cartitems.length==0) return;
	var input = cartitems;
	var temp = new Array();
	var out = new Array();
	var i,j,k=0;
	var dateA,dateB;
	out[0] = input[0];
	var d = false;
	for(i=1; i<input.length;i++){
	  temp = new Array();
	  k = 0;
	  for(j=0;j<out.length;j++){
	    dateA = input[i][2].split('-');
	    dateB = out[j][2].split('-');
	    dateA = new Date(dateA[0],dateA[1]-1,dateA[2]);
	    dateB = new Date(dateB[0],dateB[1]-1,dateB[2]);
	    if(dateA>=dateB){
	      k++;
	      temp[j] = out[j];
	    }else{
	      temp[j+1] = out[j];
	    }
	  }
	  temp[k] = input[i];
	  out = temp;
	}
	cartitems = out;
      }
      function parseCartPersons(){
	var cookieString = readCartCookie();
	var out;
	if(cookieString.indexOf('||')>-1){
	  out = cookieString.split('||');
	  out[0] = out[0].split('|');
	  cartMen = parseInt(out[0][0]);
	  cartWomen = parseInt(out[0][1]);
	}else{
	  cartMen = 0;
	  cartWomen = 0;
	}
      }
      function parseCartContent(){
	cartitems = new Array();
	var out = new Array();
	var itemsArray = new Array();
	var cookieString = readCartCookie();
	if(cookieString.indexOf('||')>-1){
	  out = cookieString.split('||');
	  out[0] = out[0].split('|');
	  if(out[1]>"") itemsArray = out[1].split('|');
	}else{
	  itemsArray = cookieString.split('|');
	}
	for(var i=0; i<itemsArray.length; i++){
	  if(itemsArray[i]>""){
	    cartitems[i] = itemsArray[i].split(',');
	  }
	}
	if(cartitems==""){
	  cartitems = new Array();
	}
	sortCartItems();
      }
      function updateCartCountry(country){
	writeCookie(country,"cartcountry");
      }
      function updateCartContent(inputArray){
	var out = new Array();
	for(var i=0; i<inputArray.length; i++){
	  if(inputArray[i]!=""){
	    out[out.length] = inputArray[i].join(',');
	  }
	}
	writeCartCookie(cartMen + '|' + cartWomen + '||' + out.join('|'));
      }
      // Cookie functions
      function readCartCookie(){
	// read "cartontent"-cookie
	return readCookie("cartcontent");
      }
      function writeCartCookie(inputString){
	// write "inputString" into "cartontent"-cookie
	writeCookie(inputString,"cartcontent");
      }
      function readHousesCookie(){
	// read "cartontent"-cookie
	return readCookie("carthouses");
      }
      function writeHousesCookie(inputString){
	// write "inputString" into "cartontent"-cookie
	writeCookie(inputString,"carthouses");
      }
      function readCookie(cookiename){
	// read cookie
	var key = cookiename+"=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
	  var c = ca[i];
	  while (c.charAt(0)==' ') c = c.substring(1,c.length);
	  if (c.indexOf(key) == 0) return unescape(c.substring(key.length,c.length));
	}
	return "";
      }
      function writeCookie(inputString,cookiename){
	// write "inputString" into cookie
	var a = new Date();
	a = new Date(a.getTime() +1000*60*60*24*365);
	document.cookie = cookiename+"="+escape(inputString)+';expires='+a.toGMTString()+';path=/';
      }