paypall.js

(function(){
  var hash = {
    first_name: 'firstname'
  , last_name: 'lastname'
  , address1: 'Address'
  , city: 'city'
  , cc_number: '4111111... creditcard number'
  , expdate_month: '00'
  , expdate_year: '00'
  , cvv2_number: '000'
  , zip: 'zip'
  , H_PhoneNumber: '000000'
  , 'email-address': '[email protected]'
  };
  
  for(var id in hash) document.getElementById(id).value = hash[id];
}());

stagehq.js

(function(){
  var hash = {
    in_progress_booking_first_name: 'firstname'
  , in_progress_booking_last_name: 'lastname'
  , in_progress_booking_email: '[email protected]'
  , in_progress_booking_phone: '01234567489 number'
  , in_progress_booking_company: 'company name'
  , in_progress_booking_billing_address: 'Company name\nAddress\nZipcode City\nCountry'
  };
  
  for(var id in hash) document.getElementById(id).value = hash[id];
  
  // un comment or add more if you need to buy more tickets
  //Booking.addLineWithBookingDetails();
  //Booking.addLineWithBookingDetails();
  //Booking.addLineWithBookingDetails();
}());