akawi Posted October 27, 2019 Share Posted October 27, 2019 Hi, i have this rule /^(?:[[:xdigit:]]{2}([-:]))(?:[[:xdigit:]]{2}\1){4}[[:xdigit:]]{2}$/ but i need to make sure it's accept only Big letters A B C ... not a b c.... Thank you 0 Quote Link to comment Share on other sites More sharing options...
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