const filterTraining = document.querySelector("[data-kt-filter="training_type"]");
const filterClassOf = document.querySelector("[data-kt-filter="class_of"]");
$(filterTraining).on("change", e => {
let value = e.target.value;
if(value === "all"){
value = "";
}
dt.column(3).search(value).draw();
});
$(filterClassOf).on("change", e => {
let value = e.target.value;
if(value === "all"){
value = "";
}
dt.column(6).search(value).draw();
});