// Required on load functions

                window.onload = function() {
                
                    var dateInit = document.ff_fs.dateCheck.value;                   
                     
                    // Only set current date on initial page request when date has not already been initialised
                    if (dateInit == "init_no") {
                        initDate(document.ff_fs, document.ff_fs.departureMonth, document.ff_fs.departureDay); 
                        document.ff_fs.dateCheck.value = "init_yes"; 
                    }
                   
                    preloadImgs('/content/images/uk/modules/common/error2.gif', 13, 15,
                                '/content/images/uk/modules/common/error3.gif', 15, 18);  
                    
                   
                }        


                // VALIDATE FORM
                    
                function validateForm() { 
                  
                    var errHeadSet = false;
                    var isValid = true;
                    var orig = document.forms["ff_fs"]["origin"];
                    var dest = document.forms["ff_fs"]["destination"];
                    var tripType = document.forms["ff_fs"]["tripType"]
                    var numAdt = document.forms["ff_fs"]["numAdultPassengers"];
                    var numChd = document.forms["ff_fs"]["numChildPassengers"];
                    var depMonth = document.forms["ff_fs"]["departureMonth"];
                    var depDay = document.forms["ff_fs"]["departureDay"];
                    var depTime = document.forms["ff_fs"]["departureTime"];
                    var retMonth = document.forms["ff_fs"]["returnMonth"];
                    var retDay = document.forms["ff_fs"]["returnDay"];
                    var retTime = document.forms["ff_fs"]["returnTime"];

                    // Checks if dropdown of free search is being used
                    if (document.forms["ff_fs"]["originFreeSearch"].value == "true") {
                        orig = orig.value;
                    } 
                    else {
                        orig = orig.options[orig.selectedIndex].value;    
                    }
                     
                    if (document.forms["ff_fs"]["destinationFreeSearch"].value == "true") {
	                    dest = dest.value;
	                } 
	                else {
	                    dest = dest.options[dest.selectedIndex].value;    
                    }               

                    /**** 
                     * Fix for defect 2560 - Added 09/28/09
                     * Regex for permitted characters, anything outside of this range will be rejected
                     * Permitted characters = Extended latin chars and a-z. Case is ignored
                     **/ 						
                    var rePcr = /[^a-z\s\u00e0-\u00ef\u00f1-\u00f6\u00f8-\u00fc]/i;		
					
					// End of defect 2560 fix

                   // Calculate total passenger count

                   var ttlPaxCount = parseInt(numAdt.options[numAdt.selectedIndex].value) + parseInt(numChd.options[numChd.selectedIndex].value);
                       
                   // Clear any previous error messages before validating form
                   fsError.clearError('error', 'span'); 
                   fsError.clearError('ffSf','label');  
                    
                   if (orig == "" || rePcr.test(orig)) {                     
                       if (!errHeadSet) {
                           fsError.setMessageHeader('error', 'The following error(s) occured', 'SFError', '/content/images/uk/modules/common/error3.gif'); 
                           errHeadSet = true; 
                       }
                        
                       fsError.setMessage('error', 'Please provide us with a departure city and try again.'); 
                       fsError.setAlert('from', '/content/images/uk/modules/common/error2.gif'); 
                       isValid = false;       
                     
                   }
                     
                   if (dest == "" || rePcr.test(dest)) {                                               
                       if (!errHeadSet) {
                           fsError.setMessageHeader('error', 'The following error(s) occured', 'SFError', '/content/images/uk/modules/common/error3.gif');
                           errHeadSet = true; 
                       }
                           
                       fsError.setMessage('error', 'Please provide us with a return city and try again.');
                       fsError.setAlert('to', '/content/images/uk/modules/common/error2.gif');
                       isValid = false;    
                        
                   }

                   if (ttlPaxCount > 6) {                                               
                       if (!errHeadSet) {
                           fsError.setMessageHeader('error', 'The following error(s) occured', 'SFError', '/content/images/uk/modules/common/error3.gif');
                           errHeadSet = true;
                       } 
                                        
                           fsError.setMessage('error', 'The maximum total number of passengers you can book online is six.');
                           fsError.setAlert('adult', '/content/images/uk/modules/common/error2.gif');
                           isValid = false;                                      
                   }                                                                             
                    
                   // Check if outbound date is within permitted range of 329 days
                   if (!checkDateRange(document.ff_fs.departureMonth.options[document.ff_fs.departureMonth.selectedIndex].value, document.ff_fs.departureDay.options[document.ff_fs.departureDay.selectedIndex].value, 0, 0, 0, 329, true)) {                                              
                       if (!errHeadSet) {
                           fsError.setMessageHeader('error', 'The following error(s) occured', 'SFError', '/content/images/uk/modules/common/error3.gif');
                           errHeadSet = true; 
                       }                       
                           
                       fsError.setMessage('error', 'We can only display departing flights up to 329 days from today.');
                       fsError.setAlert('depDate', '/content/images/uk/modules/common/error2.gif');
                       
                       
                       if (tripType.value != "oneWay") {
                           fsError.setMessage('error', 'We can only display flights returning within the next 329 days.');
                           fsError.setAlert('retDateLbl', '/content/images/uk/modules/common/error2.gif');
                       }                                             
                       
                       isValid = false;    
                        
                   }              
                   
                   // If trip type selected is not one-way check if return date is within permitted range of 329 days & in chronological order
                   if (checkDateRange(document.ff_fs.departureMonth.options[document.ff_fs.departureMonth.selectedIndex].value, document.ff_fs.departureDay.options[document.ff_fs.departureDay.selectedIndex].value, 0, 0, 0, 329, true)) {                       
                       var obYear = getYear(document.ff_fs.departureMonth.options[document.ff_fs.departureMonth.selectedIndex].value, document.ff_fs.departureDay.options[document.ff_fs.departureDay.selectedIndex].value);
                       
                       if (tripType.value != "oneWay") {
                           
                           if (!checkDateRange(document.ff_fs.returnMonth.options[document.ff_fs.returnMonth.selectedIndex].value, document.ff_fs.returnDay.options[document.ff_fs.returnDay.selectedIndex].value, obYear, document.ff_fs.departureMonth.options[document.ff_fs.departureMonth.selectedIndex].value, document.ff_fs.departureDay.options[document.ff_fs.departureDay.selectedIndex].value, 329, false)) {
                                                   
                               if (!errHeadSet) {
                                   fsError.setMessageHeader('error', 'The following error(s) occured', 'SFError', '/content/images/uk/modules/common/error3.gif');
                                   errHeadSet = true; 
                               }
                           
                               fsError.setMessage('error', 'We can only display flights returning within the next 329 days.');
                               fsError.setAlert('retDateLbl', '/content/images/uk/modules/common/error2.gif');
                               isValid = false;                                                                               
                           }                         
                       }
                   } 

                   // [ER request 00001 18/04/08] Do state table lookup if more than 3 letter value
                                      
                   if (orig.length > 3) {
                       orig = checkIfState(orig);
                   }

                   if (dest.length > 3) {
                       dest = checkIfState(dest);
                   } 

                   // End of ER 00001                       

                   return isValid;
                }