$(document).ready(function() {
    var i = 1;
    $("#add_row").click(function() {
        $('#addr' + i).html("<td class='text-center'><input class='form-control' type='text' name='title[]' required></td><td class='text-center'><input class='form-control' type='text' name='value[]' required></td><td class='text-center'><span class='delete-row'>X</span></td>");
        $('#tab_logic').append('<tr id="addr' + (i + 1) + '"></tr>');
        i++;
    });
    
});