// ******************************************
// CALENDARS
// ******************************************

var fromDate = new Date();
var now = new Date();

function disallowDatesFrom(date) {
    if( date.getYear() < now.getYear() ||
        date.getYear() == now.getYear() && date.getMonth() < now.getMonth() ||
        date.getYear() == now.getYear() && date.getMonth() == now.getMonth() && date.getDate() < now.getDate())
        return true;
        
    return false;
}


function disallowDatesTo(date) {
    fromDate = new Date( 
            document.getElementById( "fromDateInput" ).value.substr( 6 ),
            document.getElementById( "fromDateInput" ).value.substr( 3, 2 ) - 1,
            document.getElementById( "fromDateInput" ).value.substr( 0, 2 ) 
    );
        
    if( date.getYear() < fromDate.getYear() ||
        date.getYear() == fromDate.getYear() && date.getMonth() < fromDate.getMonth() ||
        date.getYear() == fromDate.getYear() && date.getMonth() == fromDate.getMonth() && date.getDate() < fromDate.getDate() )
        return true;
          
    return false;
}

// ************************************ 
// DIV                                  
// ************************************ 

function findPosX(obj) {
    var curleft = 0;
    if(obj.offsetParent)
        while(1) 
        {
            curleft += obj.offsetLeft;
            if(!obj.offsetParent)
                break;
            obj = obj.offsetParent;
        }
    else if(obj.x)
        curleft += obj.x;
        
    return curleft;
}
    
function findPosY(obj) {
    var curtop = 0;
    if(obj.offsetParent)
        while(1)
        {
            curtop += obj.offsetTop;
            if(!obj.offsetParent)
                break;
            obj = obj.offsetParent;
        }
    else if(obj.y)
        curtop += obj.y;
    return curtop;
}

var simpleSearchId = "navbar_search_menu";
function showSimpleSearch( aTag, destAirport ) {
    document.getElementById( simpleSearchId ).style.display  = 'block';
    document.getElementById( simpleSearchId ).style.position = 'absolute';
    document.getElementById( simpleSearchId ).style.left     = findPosX( aTag ) + 'px'; 
    document.getElementById( simpleSearchId ).style.top      = (findPosY( aTag )+20) + 'px';
    document.simpleSearchForm.arrivo.value = destAirport;
}

function hideSimpleSearch( destAirport ) {
    document.getElementById( simpleSearchId ).style.display  = 'none';
}

var destinationMenuId  = "destination_menu";
var destinationInputId = "Search_engine1_txtDepartureFrom";
var destinationInputFormResId = "ResultSearchEngine1_txtDepartureFrom";
function showDestinations( theTag ) {
    document.getElementById( destinationMenuId ).style.display  = 'block';
    document.getElementById( destinationMenuId ).style.position = 'absolute';
    document.getElementById( destinationMenuId ).style.left     = findPosX( theTag ) + 'px'; 
    document.getElementById( destinationMenuId ).style.top      = (findPosY( theTag )+20) + 'px';
}

function hideDestinations() {
    document.getElementById( destinationMenuId ).style.display  = 'none';
}

function setDestination( destVal ) {
if(document.getElementById( destinationInputId ) != null){
    document.getElementById( destinationInputId ).value = destVal;
    }
    else
    {
    document.getElementById( destinationInputFormResId ).value = destVal;
    }
    hideDestinations();
}
function changeHome(home_name){
if (home_name == 'Volo'){
location.href='../flight';
}
if (home_name == 'Hotel'){
location.href='../flight';
}
if (home_name == 'Volo+Hotel'){
location.href='../flight_hotel';
}
if (home_name == 'Auto'){
location.href='../Auto';
}
}



function check_date(field){
var checkstr = "0123456789";
var DateField = field;
var Datevalue = "";
var DateTemp = "";
var seperator = "/";
var day;
var month;
var year;
var leap = 0;
var err = 0;
var i;
   err = 0;
   DateValue = DateField.value;
   /* Delete all chars except 0..9 */
   for (i = 0; i < DateValue.length; i++) {
	  if (checkstr.indexOf(DateValue.substr(i,1)) >= 0) {
	     DateTemp = DateTemp + DateValue.substr(i,1);
	  }
   }
   DateValue = DateTemp;
   /* Always change date to 8 digits - string*/
   /* if year is entered as 2-digit / always assume 20xx */
   if (DateValue.length == 6) {
      DateValue = DateValue.substr(0,4) + '20' + DateValue.substr(4,2); }
   if (DateValue.length != 8) {
      err = 19;}
   /* year is wrong if year = 0000 */
   year = DateValue.substr(4,4);
   if (year == 0) {
      err = 20;
   }
   /* Validation of month*/
   month = DateValue.substr(2,2);
   if ((month < 1) || (month > 12)) {
      err = 21;
   }
   /* Validation of day*/
   day = DateValue.substr(0,2);
   if (day < 1) {
     err = 22;
   }
   /* Validation leap-year / february / day */
   if ((year % 4 == 0) || (year % 100 == 0) || (year % 400 == 0)) {
      leap = 1;
   }
   if ((month == 2) && (leap == 1) && (day > 29)) {
      err = 23;
   }
   if ((month == 2) && (leap != 1) && (day > 28)) {
      err = 24;
   }
   /* Validation of other months */
   if ((day > 31) && ((month == "01") || (month == "03") || (month == "05") || (month == "07") || (month == "08") || (month == "10") || (month == "12"))) {
      err = 25;
   }
   if ((day > 30) && ((month == "04") || (month == "06") || (month == "09") || (month == "11"))) {
      err = 26;
   }
   /* if 00 ist entered, no error, deleting the entry */
   if ((day == 0) && (month == 0) && (year == 00)) {
      err = 0; day = ""; month = ""; year = ""; seperator = "";
   }
   /* if no error, write the completed date to Input-Field (e.g. 13.12.2001) */
   if (err == 0) {
      DateField.value = day + seperator + month + seperator + year;
   }
   /* Error-message if err != 0 */
   else {
      alert("La data inserita non è corretta.\n\nI formati supportati sono:\n  - ggmmaa\n  - ggmmaaaa\n  - gg/mm/aa\n  - gg/mm/aaaa\n");
      DateField.select();
	  DateField.focus();
   }
}