var toggler = document.getElementsByClassName("caret");
var i;

for (i = 0; i < toggler.length; i++) {
  toggler[i].addEventListener("click", function() {
    this.parentElement.querySelector(".nested").classList.toggle("active");
    this.classList.toggle("caret-down");
  });
}


function showResult(showClass) {
    console.log(showClass);
    var rows = document.getElementsByClassName('res'), i;
    var banners = document.getElementsByClassName(showClass), j;

    for (i = 0; i < rows.length; i += 1) {
        rows[i].style.display = 'none';
    }

    for (j = 0; i < banners.length; j += 1) {
        banners[j].style.display = 'block';
    }

}