diff --git a/res/static/song.js b/res/static/song.js
index fc2efd7..50fd498 100644
--- a/res/static/song.js
+++ b/res/static/song.js
@@ -18,7 +18,6 @@ function size(steps) {
         TRANSPOSE CHORDS
    =========================================== */
 
-
 ENG_INDEX = {'C': 0, 'C#': 1, 'Db': 1, 'D': 2, 'D#': 3, 'Eb': 3, 'E': 4, 'Fb': 4, 'F': 5, 'E#': 5, 'F#': 6, 'Gb': 6, 'G': 7, 'G#': 8, 'Ab': 8, 'A': 9, 'A#': 10, 'Bb': 10, 'B': 11, 'Cb': 11, 'B#': 0}
 LAT_INDEX = {'Do': 0, 'Do#': 1, 'Reb': 1, 'Re': 2, 'Re#': 3, 'Mib': 3, 'Mi': 4, 'Fab': 4, 'Fa': 5, 'Mi#': 5, 'Fa#': 6, 'Solb': 6, 'Sol': 7, 'Sol#': 8, 'Lab': 8, 'La': 9, 'La#': 10, 'Sib': 10, 'Si': 11, 'Dob': 11, 'Si#': 0}
 CHORDS_LAT = ['Do', 'Do#', 'Re', 'Re#', 'Mi', 'Fa', 'Fa#', 'Sol', 'Sol#', 'La', 'Sib', 'Si']
@@ -69,19 +68,21 @@ function getTranspose() {
    =========================================== */
 
 // Init
-document.addEventListener("DOMContentLoaded", function () {
+window.onload = function () {
     var show = localStorage.getItem("show_chords") == "true";
     showChords(show);
     document.getElementById("showChords").checked = show;
-}, false);
+};
 
 function showChords(show) {
     if (show || show == "true") {
         document.getElementById("songLyrics").style.display = "none";
         document.getElementById("songChords").style.display = "block";
+        document.getElementById("transposeControls").style.display = "block";
     } else {
         document.getElementById("songLyrics").style.display = "block";
         document.getElementById("songChords").style.display = "none";
+        document.getElementById("transposeControls").style.display = "none";
     }
     localStorage.setItem("show_chords", show);
-}
\ No newline at end of file
+}
diff --git a/res/templates/song.html b/res/templates/song.html
index fb84f73..97f8d3c 100644
--- a/res/templates/song.html
+++ b/res/templates/song.html
@@ -28,7 +28,7 @@
     <div>
       <label><input id="showChords" type="checkbox" checked onchange="showChords(this.checked)"/> Mostrar acordes</label>
     </div>
-    <div>
+    <div id="transposeControls">
       <label>Transponer acordes </label>
       <button class="small" onclick="transposeAdd(-2)">-2</button>
       <button class="small" onclick="transposeAdd(-1)">-1</button>