diff --git a/directory.js b/directory.js
index bda4837..2875c4e 100644
--- a/directory.js
+++ b/directory.js
@@ -1,66 +1,66 @@
-const C = document.createElement;
-// const G = document.getElementById;
+const $C = (e) => document.createElement(e);
+const $G = (e) => document.getElementById(e);
 
 const ordNrRegex = /.*pOrgNr=([0-9]+).*/gm;
 const personalIDRegex = /.*pStPersonNr=([0-9]+).*/gm;
 
 function appendLink(nonEmptyGroup) {
-  if (document.getElementById("kf-trombi_row")) return;
+  if ($G("kf-trombi_row")) return;
 
-  var row_header = document.createElement("th");
+  var row_header = $C("th");
   row_header.textContent = "Trombi";
   row_header.classList.add("kf-trombi_row_header");
 
-  var row_links = document.createElement("td");
+  var row_links = $C("td");
 
   if (nonEmptyGroup) {
 
-    var link = document.createElement("a");
+    var link = $C("a");
     link.id = "kf-trombi_link";
     link.textContent = "Show";
     link.href="#";
     link.addEventListener("click", toggleTrombi);
 
-    const inputContainer = document.createElement("span");
+    const inputContainer = $C("span");
     inputContainer.id = "kf-trombi_input_container";
     inputContainer.classList.add("hidden");
 
-    const sliderContainer = document.createElement("span");
+    const sliderContainer = $C("span");
     sliderContainer.id = "kf-trombi_slider_container";
 
-    var slider = document.createElement("input");
+    var slider = $C("input");
     slider.id = "kf-trombi_columns_slider";
     slider.type = "range";
     slider.value = 5;
     slider.min = 3;
     slider.max = 8;
 
-    var column_nr = document.createElement("span");
+    var column_nr = $C("span");
     column_nr.id = "kf-trombi_column_nr";
     column_nr.textContent = slider.value;
-    var column_label = document.createElement("span");
+    var column_label = $C("span");
     column_label.textContent = " columns";
 
     slider.addEventListener("input", (event) => {
       column_nr.textContent = slider.value;
-      const trombi = document.getElementById("kf-trombi_trombi");
+      const trombi = $G("kf-trombi_trombi");
       trombi.classList.remove( "kf-trombi_trombi_3", "kf-trombi_trombi_4", "kf-trombi_trombi_5", "kf-trombi_trombi_6", "kf-trombi_trombi_7", "kf-trombi_trombi_8" );
       trombi.classList.add(`kf-trombi_trombi_${slider.value}`);
     })
 
     sliderContainer.append(slider, column_nr, column_label);
 
-    enhanced_checkbox = document.createElement("input");
+    enhanced_checkbox = $C("input");
     enhanced_checkbox.id = "kf-trombi_enhanced_checkbox";
     enhanced_checkbox.type = "checkbox";
     enhanced_checkbox.checked = true;
 
-    var enhance_label = document.createElement("label");
+    var enhance_label = $C("label");
     enhance_label.textContent = " Enhance for printing";
     enhance_label.htmlFor = "kf-trombi_enhanced_checkbox";
 
     enhanced_checkbox.addEventListener("input", (event) => {
-      const trombi = document.getElementById("kf-trombi_trombi");
+      const trombi = $G("kf-trombi_trombi");
       trombi.classList.toggle('kf-trombi_enhanced');
     })
     inputContainer.append(sliderContainer, enhanced_checkbox, enhance_label);
@@ -69,12 +69,12 @@ function appendLink(nonEmptyGroup) {
     row_links.textContent = "empty group!"
   }
 
-  var tr = document.createElement("tr");
+  var tr = $C("tr");
   tr.classList.add("coNavGroup");
   tr.append(row_header, row_links);
   tr.id = "kf-trombi_row";
 
-  const nav = document.getElementById("idPageNavi");
+  const nav = $G("idPageNavi");
   nav.tBodies[0].append(tr);
 }
 
@@ -88,14 +88,14 @@ function extractIDs(url) {
 function generateCard(student, col) {
   const url = `/kfu_online/pl/ui/$ctx/wbstudkart.wbShowImage?pOrgNr=${student.ids.org}&pStPersonNr=${student.ids.perso}&pType=U`
 
-  const d = document.createElement("div");
+  const d = $C("div");
   d.classList.add("kf-trombi_card");
 
-  const img = document.createElement("img");
+  const img = $C("img");
   img.classList.add("kf-trombi_trombi_img");
   img.src = url;
 
-  const name_div = document.createElement("div");
+  const name_div = $C("div");
   name_div.textContent = `${student.firstname} ${student.lastname}`;
 
   d.append(img, name_div);
@@ -103,10 +103,10 @@ function generateCard(student, col) {
 }
 
 function toggleTrombi() {
-  const trombi = document.getElementById("kf-trombi_trombi");
-  const form = document.getElementById("idTNListe");
-  const link = document.getElementById("kf-trombi_link");
-  const inputContainer = document.getElementById("kf-trombi_input_container");
+  const trombi = $G("kf-trombi_trombi");
+  const form = $G("idTNListe");
+  const link = $G("kf-trombi_link");
+  const inputContainer = $G("kf-trombi_input_container");
   trombi.classList.toggle("hidden");
   form.classList.toggle("hidden");
   if(inputContainer.classList.toggle("hidden")) {
@@ -117,17 +117,17 @@ function toggleTrombi() {
 }
 
 function generateTrombi() {
-  var trombi = document.getElementById("kf-trombi_trombi");
+  var trombi = $G("kf-trombi_trombi");
   if (trombi) { trombi.remove(); }
-  const slider = document.getElementById("kf-trombi_columns_slider");
-  trombi = document.createElement("div");
+  const slider = $G("kf-trombi_columns_slider");
+  trombi = $C("div");
   trombi.id = "kf-trombi_trombi";
   trombi.classList.add("hidden");
   trombi.classList.add(`kf-trombi_trombi_${slider.value}`);
   trombi.classList.add("kf-trombi_enhanced");
-  const form = document.getElementById("idTNListe");
+  const form = $G("idTNListe");
 
-  const table_body = document.getElementById("idTNVWTable").tBodies[0];
+  const table_body = $G("idTNVWTable").tBodies[0];
 
   const student_list = [];
   for (let row of table_body.children) {
@@ -146,10 +146,10 @@ function generateTrombi() {
 }
 
 // reset
-if (document.getElementById("kf-trombi_trombi")) {
-  document.getElementById("idTNListe").classList.remove("hidden");
-  document.getElementById("kf-trombi_trombi").remove();
-  document.getElementById("kf-trombi_row").remove();
+if ($G("kf-trombi_trombi")) {
+  $G("idTNListe").classList.remove("hidden");
+  $G("kf-trombi_trombi").remove();
+  $G("kf-trombi_row").remove();
 }
 
 // only enable on non-empty groups