change:
var Booking_Enquiry_group_Dates_From_Spry = new Spry.Widget.ValidationTextField("Booking_Enquiry_group_Dates_From_Spry", "date", { format:'mm/dd/yyyy' , validateOn:["blur"]});
var Booking_Enquiry_group_Dates_To_Spry = new Spry.Widget.ValidationTextField("Booking_Enquiry_group_Dates_To_Spry", "date", { format:'mm/dd/yyyy' , validateOn:["blur"]});
to:
var Booking_Enquiry_group_Dates_From_Spry = new Spry.Widget.ValidationTextField("Booking_Enquiry_group_Dates_From_Spry", "date", { format:'dd/mm/yyyy' , validateOn:["blur"]});
var Booking_Enquiry_group_Dates_To_Spry = new Spry.Widget.ValidationTextField("Booking_Enquiry_group_Dates_To_Spry", "date", { format:'dd/mm/yyyy' , validateOn:["blur"]});
Many thanks Jason,
Working perfectly.
Les