rrrr-mm-dd lepiej

$( document ).ready(function() {
    $("input").keyup(function(){
        var date = $(this).val();
		var reg = /^(\d{2})[-\/](\d{2})[-\/](\d{4})$/.test(date);
    if (reg){
        $("div").text("Good Formatting!");
    }else
    {
        $("div").text("BAD JOB");
    }
});
});