var coll = document.getElementsByClassName("collapsible");
    var i;

    for (i = 0; i < coll.length; i++) {
        coll[i].addEventListener("click", function () {
            this.classList.toggle("active");
            var content = this.nextElementSibling;
            if (content.style.display === "block") {
                content.style.display = "none";
            } else {
                content.style.display = "block";
            }
        });
    }

    var div = document.getElementById('sortdirect');

// div.innerHTML += document.getElementsByClassName('directory');

    for (var i = 0; i < document.getElementsByClassName("directory").length; i++) {
        var directory = "directory" + i;
        var child = document.getElementById(directory);
        div.appendChild(child);
    }
    for (var j = 0; j < document.getElementsByClassName("file").length; j++) {
        var fdirectory = "file" + j;
        document.getElementById(fdirectory);
        var fchild = document.getElementById(fdirectory);
        div.appendChild(fchild);
    }

    for (var u = 0; u < document.getElementsByClassName("sortit").length; u++) {
        for (var i = 0; i < document.getElementsByClassName("directory").length; i++) {
            var sortdir = "directory" + i;
            var child = document.getElementById(directory).innerHTML;
            var re = new RegExp("admin\.");
            if (re.test(child)) {
                console.log("Valid");
            } else {
                console.log("Invalid");
            }
        }
    }


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

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