diff --git a/categories.js b/categories.js
new file mode 100644
index 0000000..f904e70
--- /dev/null
+++ b/categories.js
@@ -0,0 +1,13 @@
+var categories = document.getElementsByClassName("categorie-checkbox");
+
+var form = document.getElementById("form-categories");
+
+for(categorie in categories)
+{
+    categorie.addEventListener('change', function() {
+        //TODO
+        'use strict';
+        alert('OK');
+        form.submit();
+    }, false);
+}
diff --git a/index.php b/index.php
index 18eb07e..ed57123 100644
--- a/index.php
+++ b/index.php
@@ -43,7 +43,7 @@ else
                 </div>
             </a>
             <div id="container">
-                <form method="post" action="./update-categories.php">
+                <form method="post" id="form-categories" action="./update-categories.php">
                     <?php
                     for($tab = 0; $tab < 2; ++$tab)
                     {
@@ -64,7 +64,7 @@ else
                                 $cat_id = $categories[$cat_it]['cat_id'];
                                 $cat_title = $categories[$cat_it]['cat_title'];
                         ?>
-                        <input type="checkbox" id="cat_<?php echo $cat_id; ?>" name="cat_<?php echo $cat_id; ?>" <?php if($_SESSION['categorieStatus'][$cat_id]) echo 'checked'; ?> />
+                        <input class="categorie-checkbox" type="checkbox" id="cat_<?php echo $cat_id; ?>" name="cat_<?php echo $cat_id; ?>" <?php if($_SESSION['categorieStatus'][$cat_id]) echo 'checked'; ?> />
                         <label for="cat_<?php echo $cat_id; ?>"><span></span><?php echo $cat_title;?></label><br />
                         <?php
                             }
@@ -145,5 +145,6 @@ else
                 <div>
                 </div>
                 <script src="hamburger.js"></script>
+                <script src="categories.js"></script>
                 </body>
             </html>