diff --git a/OOMAnalyser.html b/OOMAnalyser.html
index 5824afc..0bc4872 100644
--- a/OOMAnalyser.html
+++ b/OOMAnalyser.html
@@ -30,12 +30,11 @@
             vertical-align: super;
             font-size: 0.83em;
         }
-
-        .text--default-hide {
+        .js-text--default-hide {
             /* empty just used to hide elements in the default view */
 
         }
-        .text--default-show {
+        .js-text--default-show {
             /* empty just used to show elements in the default view */
         }
 
@@ -159,9 +158,9 @@ function goBack() {
 </p>
 
 <p>
-<div class="terminal notify_box text--default-hide js-text--display-none" id="notify_box"></div>
+<div class="terminal notify_box js-text--default-hide js-text--display-none" id="notify_box"></div>
 
-<div class="text--default-show" id="input">
+<div class="js-text--default-show" id="input">
     <h2 id="step1">Step 1 - Enter your OOM message</h2>
     <textarea autocomplete="off" cols="100" id="textarea_oom" onfocusin="OOMAnalyser.OOMDisplayInstance.empty_textarea_oom()" rows="20" title="OOM input field">Add your OOMhere</textarea>
     <br/>
@@ -170,7 +169,7 @@ function goBack() {
     <button onclick="OOMAnalyser.OOMDisplayInstance.copy_example_to_form()" title="Copy an example OOM into the input area">Insert example</button>
 </div>
 
-<div class="text--default-hide js-text--display-none" id="analysis">
+<div class="js-text--default-hide js-text--display-none" id="analysis">
 
 <h2 id="step2">Step 2 - Results</h2>
     <p>
@@ -640,7 +639,7 @@ function goBack() {
        title="Show / hide news">(click to show / hide)</a>
 </div>
 
-<div class="text--default-hide js-text--display-none" id="changelog">
+<div class="js-text--default-hide js-text--display-none" id="changelog">
     <h3>Version 0.3.0 - 2019-XX-XX:</h3>
 
     <h4>General</h4>
@@ -672,7 +671,7 @@ function goBack() {
        title="Show / hide installation guide">(click to show / hide)</a>
 </div>
 
-<div class="text--default-hide js-text--display-none" id="installation">
+<div class="js-text--default-hide js-text--display-none" id="installation">
     Installing OOMAnalyser is quite easy since OOMAnalyser consists only of two files, a
     HTML file and a JavaScript file. Both can be stored locally to use OOMAnalyser
     without an Internet connection.
diff --git a/OOMAnalyser.py b/OOMAnalyser.py
index 5900e8b..a3c1dd8 100644
--- a/OOMAnalyser.py
+++ b/OOMAnalyser.py
@@ -871,11 +871,11 @@ Killed process 6576 (java) total-vm:33914892kB, anon-rss:20629004kB, file-rss:0k
             document.getElementById('textarea_oom').value = self.paste_note
 
         # hide all elements marked to be hidden by default
-        for element in document.querySelectorAll('.text--default-hide'):
+        for element in document.querySelectorAll('.js-text--default-hide'):
             element.classList.add('js-text--display-none')
 
         # show all elements marked to be shown by default
-        for element in document.querySelectorAll('.text--default-show'):
+        for element in document.querySelectorAll('.js-text--default-show'):
             element.classList.remove('js-text--display-none')
 
         # show hidden rows