add button functionality

Author: Supravisor

index.html

@@ -23,11 +23,10 @@ <h2>Diff checker</h2>
     </div>
 
     <div id="buttons">
-      <button>Hide Original</button>
-      <button>Hide Compare</button>
+      <button id="button-original">Hide Original</button>
+      <button id="button-compare">Hide Compare</button>
     </div>
 
-
     <script src="script.js"></script>
 </body>
 </html>