// JavaScript Document
// AMENDED by RNL to show output date as dd-mm-yyyy the same format as Calendar return date

function checkdate(objName) {
    var datefield = objName;
    if (chkdate(objName) == false) {
//        datefield.select();
        alert("The date entered is invalid.  Please try again.");
//        datefield.focus();
          document.form.ARRIVAL_DATE.focus();	
         return false;
    }
    else
        {
           return true;
        }
    }


function chkdate(objName) {
//var strDatestyle = "US"; //United States date style
var strDatestyle = "EU";  //European date style
var strDate;
var strDateArray;
var strDay;
// added by RNL for final 2 character day and month date display
var strday;
var strMth;
//
var strMonth;
var strYear;
var intday;
var intMonth;
var intYear;
var booFound = false;
var datefield = objName;
var strSeparatorArray = new Array("-"," ","/",".");
var intElementNr;
var err = 0;
var strMonthArray = new Array(12);
strMonthArray[0] = "Jan";
strMonthArray[1] = "Feb";
strMonthArray[2] = "Mar";
strMonthArray[3] = "Apr";
strMonthArray[4] = "May";
strMonthArray[5] = "Jun";
strMonthArray[6] = "Jul";
strMonthArray[7] = "Aug";
strMonthArray[8] = "Sep";
strMonthArray[9] = "Oct";
strMonthArray[10] = "Nov";
strMonthArray[11] = "Dec";
strDate = datefield.value;
if (strDate.length < 1) {
return true;
}
for (intElementNr = 0; intElementNr < strSeparatorArray.length; intElementNr++) {
if (strDate.indexOf(strSeparatorArray[intElementNr]) != -1) {
strDateArray = strDate.split(strSeparatorArray[intElementNr]);
if (strDateArray.length != 3) {
err = 1;
return false;
}
else {
strDay = strDateArray[0];
strMonth = strDateArray[1];
strYear = strDateArray[2];
}
booFound = true;
   }
}
if (booFound == false) {
if (strDate.length>5) {
strDay = strDate.substr(0, 2);
strMonth = strDate.substr(2, 2);
strYear = strDate.substr(4);
   }
}
if (strYear.length == 2) {
strYear = '20' + strYear;
}
// US style
if (strDatestyle == "US") {
strTemp = strDay;
strDay = strMonth;
strMonth = strTemp;
}
intday = parseInt(strDay, 10);
if (isNaN(intday)) {
err = 2;
return false;
}
intMonth = parseInt(strMonth, 10);
if (isNaN(intMonth)) {
for (i = 0;i<12;i++) {
if (strMonth.toUpperCase() == strMonthArray[i].toUpperCase()) {
intMonth = i+1;
strMonth = strMonthArray[i];
i = 12;
   }
}
if (isNaN(intMonth)) {
err = 3;
return false;
   }
}
intYear = parseInt(strYear, 10);
if (isNaN(intYear)) {
err = 4;
return false;
}
if (intMonth>12 || intMonth<1) {
err = 5;
return false;
}
if ((intMonth == 1 || intMonth == 3 || intMonth == 5 || intMonth == 7 || intMonth == 8 || intMonth == 10 || intMonth == 12) && (intday > 31 || intday < 1)) {
err = 6;
return false;
}
if ((intMonth == 4 || intMonth == 6 || intMonth == 9 || intMonth == 11) && (intday > 30 || intday < 1)) {
err = 7;
return false;
}
if (intMonth == 2) {
if (intday < 1) {
err = 8;
return false;
}
if (LeapYear(intYear) == true) {
if (intday > 29) {
err = 9;
return false;
}
}
else {
if (intday > 28) {
err = 10;
return false;
}
}
}
if (strDatestyle == "US") {
datefield.value = strMonthArray[intMonth-1] + " " + intday+" " + strYear;
}
else {

// show date as dd-mm-yyyy the same format as Calendar return date
// ensure single character day and months have a preceding zro
strday = intday;
strday = strday + "";

if (strday.length == 1)
   {
   strday = "0" + strday;
   }

strMth = intMonth;
strMth = strMth + "";

if (strMth.length == 1)
   {
   strMth = "0" + strMth;
   }

datefield.value = strday + "-" + strMth + "-" + strYear;
//datefield.value = intday + " " + strMonthArray[intMonth-1] + " " + strYear;
}
return true;
}
function LeapYear(intYear) {
    if (intYear % 100 == 0) {
        if (intYear % 400 == 0) { return true; }
    }
     else
	    {
            if ((intYear % 4) == 0) { return true; }
        }
return false;
}

function doDateCheck(from, to) {

// put dates in yyyymmdd format before cross checking

var strDate;
var strDay;
var strMonth;
var strYear;

var FromDate;
var ToDate;

strDate = from.value;

strDay = strDate.substr(0, 2);
strMonth = strDate.substr(3, 2);
strYear = strDate.substr(6,4);

FromDate =  strYear + strMonth +  strDay;

strDate = to.value;

strDay = strDate.substr(0, 2);
strMonth = strDate.substr(3, 2);
strYear = strDate.substr(6,4);

ToDate =  strYear + strMonth +  strDay;
// These dates are OPTIONAL BUT BOTH MUST BE ENTERED
if (FromDate != "" && ToDate == "") {	
// if (from.value == "" || to.value == "") 
    alert("Both dates must be entered.");
    document.contact_us.ARRIVAL_DATE.focus();		
	return false;
}
else	
    {
	    if (FromDate == "" && ToDate != "") {		 
           alert("Both dates must be entered.");
            document.contact_us.ARRIVAL_DATE.focus();	
	        return false;
	    }
        else
	       {
              if (ToDate < FromDate) {
                  alert("End Date must be same as or later than the Start Date. ");
                  document.contact_us.DEPARTURE_DATE.focus();	
                   return false;
              }
           }
	 }
return true;
}


function checkandcomparedate(objName,from,to) {
var datefield = objName;
if (chkdate(objName) == false) {
//        datefield.select();
          alert("That date entered is invalid.  Please try again.");
//        datefield.focus();
          document.contact_us.ARRIVAL_DATE.focus();	
          return false;
    }
    else
    {
         if (doDateCheck(from, to) == false) {
            document.contact_us.ARRIVAL_DATE.focus();	
//          datefield.focus();			
            return false;
	     }
    }
return true;
}

function validatearrivedepartdates(from,to) {

    if (checkdate(from) == true){
        if (checkdate(to) == true){
            if (doDateCheck(from,to) == true){
				return true;
			}
		}
	}
return false;
}

//  End -->