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lxl
2022-09-16 cb746cca26fa024018d7ce772ba6a96557ea768b
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$.validator.addMethod("dateNL", function(value, element) {
    return this.optional(element) || /^(0?[1-9]|[12]\d|3[01])[\.\/\-](0?[1-9]|1[012])[\.\/\-]([12]\d)?(\d\d)$/.test(value);
}, $.validator.messages.date);