/***************************************************************************************************************************
  GENERAL UTILITIES
  CALENDAR AND DATE VALIDATION FUNCTIONS  
***************************************************************************************************************************/

// Gets and sets current day and month for departures
           
function initDate(fName, depMonth, depDay) {  

    var theForm = fName;                     
    var dateNow = new Date();
    var curMonth = dateNow.getMonth();
    var curDay = dateNow.getDate();
                    
    if (curDay == 31) {
        curDay = 0;
        curMonth++;
    }  
                  
    // Set our departure day to today+1 and set current month
                   
   depMonth.selectedIndex = curMonth;
   depDay.selectedIndex = curDay; 
                    
   // Update day and month values                    
   updateReturnDate(theForm);                                    
}

function checkDateRange(getMonth, getDay, getObYear, getObMonth, getObDay, maxRange, orIbCheck) {    
    
    var isValid = true;
    // Selected date values
    var year = getYear(getMonth, getDay); 
    var month = parseInt(getMonth); 
    var day = parseInt(getDay);

    // Outbound date values
    var obYear = parseInt(getObYear);
    var obMonth = parseInt(getObMonth); 
    var obDay = parseInt(getObDay);
     
    var legalRange = new Date(); 
      
    if (!orIbCheck) {    
             
        if (obYear > year) {
            year++;
        }  
        if (obYear == year) {
            if (month < obMonth) {
                year++;               
            }
            else if (month == obMonth && day < obDay) {
                year++;                              
            }
        }            
    }    

    legalRange.setDate(legalRange.getDate() + maxRange);    
    var lrYear = legalRange.getUTCFullYear();
    var lrMonth = legalRange.getUTCMonth()+1;
    var lrDay = legalRange.getUTCDate(); 

    var lrDate = new Date(lrYear, lrMonth, lrDay);
    var selectedDate = new Date(year, month, day); 

    if (selectedDate > lrDate) {
        isValid = false;        
    }  
    
    return isValid;
}

function getYear(getMonth, getDay) {

    var year;
    var month = parseInt(getMonth);
    var day = parseInt(getDay);
    var date = new Date();
    
    if (month <= date.getUTCMonth()+1) {
        if (month == date.getUTCMonth()+1 && day < date.getUTCDate()) {
            year = date.getUTCFullYear() + 1;
        }
        else if (month < date.getUTCMonth()+1) {
            year = date.getUTCFullYear() + 1;
        } else {
            year = date.getUTCFullYear();
        }        
    } else {
        year = date.getUTCFullYear();        
    }   

    return year;
}

// Launch applicable calendar popup

function launchCalendar(calForm, formName,langVal){
    var urlVer;
     
    if (langVal == 'll') {
        urlVer = '/pubcontent/en_GB/apps/common/calendar.jsp';
    }   
    else if (langVal == 'en') {
        urlVer = '/pubcontent/en_GB/apps/common/calendar.jsp'; 
    }        
    
    eval('document.'+formName+'.currentCalForm.value = calForm');
    var calWin =  window.open(urlVer,formName,'scrollbars=no,menu=no,width=300,height=165,top=125,left=325');
    calWin.focus();
}

// DATE VALIDATION CODE ADAPTED FROM AA.COM 

function leapYear(theYear) {
    
    if ( ((theYear % 4 == 0) && (theYear % 100 != 0)) || (theYear % 400 == 0) ) {
        return true;
    } 
    else {
	return false;
    }
}
		
/**** 	
 Set the return month and day to two days after the departure month and day. 
 [chalsted] ER #9196
****/
		
function updateReturnDate(formName) { 

    var d = new Date();
    var dYear = d.getFullYear();			
    var dDay = formName.departureDay.selectedIndex;
    var dMonth = formName.departureMonth.selectedIndex;                     

    var today = new Date();
    var threeDaysInfuture = new Date();
    threeDaysInfuture.setDate(today.getDate() + 3);

    /* Start of ER 12182 :ER - Return Date should not default to Outbound + 2
     * if return date has been specified by user
     */
    var rDy = formName.returnDay.selectedIndex;
    var rMon = formName.returnMonth.selectedIndex;

    //var changed = true;
    //if((rDy == threeDaysInfuture.getDate() - 1) && (rMon == threeDaysInfuture.getMonth()))
    //changed = false;	
    //if(changed == true && formName.changed == null) //new page - keep date changes
    // return;

    var rYr = d.getFullYear();

    // for next year
    if (formName.returnMonth.selectedIndex < d.getMonth()){
        rYr = rYr+1;
    }
    // for next year
    if (formName.departureMonth.selectedIndex < d.getMonth()){
        dYear = dYear+1;
    }
    
    rDate = new Date(rYr, rMon, rDy);
    dDate = new Date(dYear, dMonth, dDay+2);

    // end of ER 12182 :

    var rYear  = dYear;
    var rMonth = '0';
    var rDay   = '0';

    // 30 Days:  April-3 June-5 September-8 November-10
    // 31 Days:  January-0, March-2, May-4, July-6, August-7, October-9, December-11
    // 28 Days:  February-1

    // For Months with 31 days 
    if ((dMonth == '0' || 
	 dMonth == '2' || 
	 dMonth == '4' || 
	 dMonth == '6' || 
	 dMonth == '7' || 
	 dMonth == '9' || 
	 dMonth == '11' )) {
                
        if (dDay == '29') {         
	    rDay = '0';
	    
	    // If December, set month back to '0' for January
	    if (dMonth == '11') {
	        rMonth = '0';
	    }
	    else {
	        rMonth = dMonth + 1;
	    }                  
        }
        else if (dDay == '30') {
	    rDay = '1';
                       
 	    // If December, set month back to '0' for January
	    if (dMonth == '11') {
	        rMonth = '0';
	    }
	    else {
	        rMonth = dMonth + 1;
	    }               
	}
	else {
	    rDay = dDay + 2;
	    rMonth = dMonth;
	}

    // For Months with 30 days 				
    }
    else if ((dMonth == '3' || 
	      dMonth == '5' || 
	      dMonth == '8' || 
	      dMonth == '10' )) {
	      
        /* test for invalid dates */
	if (dDay == '30' || dDay == '31') {
	    dDay = '29';
	    eval (formName.departureDay.selectedIndex = dDay);
	} 

	if (dDay == '28') { 
	    rDay = '0';
	    rMonth = dMonth + 1;
	}
	else if (dDay == '29') {
	    rDay = '1';
	    rMonth = dMonth + 1;
	}
	else {
            rDay = dDay + 2;
	    rMonth = dMonth;
				}
	// For February, check for leapyear.
	}
	
    else if (dMonth == '1') {
                   
        /***********************************************************
         13 Apr 07 - Updated validation to take account of leap year 
         [O.Ammann]  
        ***********************************************************/ 			

        // Check to see if Feb 29, 30, or 31 is selected for NON-leapyear.
        // If so, set departure date to Feb 28.

        if (!leapYear(rYear)) {

	    if (dDay == '28' || dDay == '29' || dDay == '30') {
	        dDay = '27';
	        eval (formName.departureDay.selectedIndex = dDay);                                                
	    }
        } 
        else if (leapYear(rYear)) {

	    if (dDay == '29' || dDay == '30') {
	        dDay = '28';
	        eval (formName.departureDay.selectedIndex = dDay);                                                
	    }
        }

        if ((leapYear(rYear) && dDay == '27') || (!leapYear(rYear) && dDay == '26')) {
	    rDay = '0';
	    rMonth = dMonth + 1;
        }
        else if ((leapYear(rYear) && dDay == '28') || (!leapYear(rYear) && dDay == '27')) {
	    rDay = '1';
	    rMonth = dMonth + 1;
        }
        else {
	    rDay = dDay + 2;
	    rMonth = dMonth;
        }
    }
    //check to see if on different page
    if(formName.dateChanged != null && formName.dateChanged.value == 'true') {
        return;
    }
    
    if(formName.returnDay.changed == null && formName.changed == null){
        eval (formName.returnDay.selectedIndex = rDay);
    }

    if( formName.returnMonth.changed == null && formName.changed == null){
        eval (formName.returnMonth.selectedIndex = rMonth);
    }
    
    return; 
}
                
function validateReturn(theForm) {
			
	var formName = eval('document.' + theForm);
	var dMonth = formName.returnMonth.selectedIndex;
	var dDay   = formName.returnDay.selectedIndex;                        
	var dYear = getYear(dMonth, dDay);                    
                        
	// For Months with 31 days 
	if ((dMonth == '0' || 
		 dMonth == '2' || 
		 dMonth == '4' || 
		 dMonth == '6' || 
		 dMonth == '7' || 
		 dMonth == '9' || 
		 dMonth == '11' )) {
          
	    if (dDay == '30' || dDay == '31') {
			dDay = '29';
			//eval (formName.returnDay.selectedIndex = dDay);
		}
        
    // For Months with 30 days 				
    }
    else if ((dMonth == '3' || 
	   		  dMonth == '5' || 
			  dMonth == '8' || 
			  dMonth == '10' )) {

	    if (dDay == '30' || dDay == '31') {
			dDay = '29';
			eval (formName.returnDay.selectedIndex = dDay);
		}
		
	/***********************************************************
	 13 Apr 07 - Updated validation to take account of leap year 
	 [O.Ammann]  
	***********************************************************/   
	
	// For February, check for leapyear.
	} else if (dMonth == '1') {
	
	    if (!leapYear(dYear)) {
	    
		    if (dDay == '28' || dDay == '29' || dDay == '30') {
			    dDay = '27';
				eval (formName.returnDay.selectedIndex = dDay);
			}
		}
		else if (leapYear(dYear)) {
		
		    if (dDay == '29' || dDay == '30') {
		        dDay = '28';
				eval (formName.returnDay.selectedIndex = dDay);
		    }
	    }
	}
}

function updateChangedDate(selectObject) {
    selectObject.changed = true; 
    if(selectObject.form.dateChanged) {
	    selectObject.form.dateChanged.value = true;
	}
}

// Preload module images
function preloadImgs(img1, w1, h1, img2, w2, h2) {

	image1 = new Image(w1,h1);
	image1.src = img1;

	image2 = new Image(w2,h2);
	image2.src = img2;        

}


// [ER request 00001 18/04/08] State lookup function
function checkIfState(getStr) {

	var sTable = ['london heathrow', 'hawaii', 'hawai', 'florida', 'new york', 'newyork', 'new york jfk', 'colorado'];
	var lookUp = ['LHR', 'HNL', 'HNL', 'MIA', 'NYC', 'NYC', 'JFK', 'DEN'];

	for (i = 0; i < sTable.length; i++) {
		if (getStr.toLowerCase() == sTable[i]) {
			getStr = lookUp[i]; 
		}
	}

	return getStr;
}

// Remove default orig/dest values
function doDefaultRemove(formFld) {
	formFld.value = "";
}