diff --git a/vnc.html b/vnc.html
index 5019bfd9..b7074237 100644
--- a/vnc.html
+++ b/vnc.html
@@ -67,13 +67,17 @@
             <!--noVNC Touch Device only buttons-->
             <div id="noVNC_mobile_buttons">
                 <input type="image" alt="No mousebutton" src="app/images/mouse_none.svg"
-                    id="noVNC_mouse_button0" class="noVNC_button" />
+                    id="noVNC_mouse_button0" class="noVNC_button"
+                    title="Active Mouse Button"/>
                 <input type="image" alt="Left mousebutton" src="app/images/mouse_left.svg"
-                    id="noVNC_mouse_button1" class="noVNC_button" />
+                    id="noVNC_mouse_button1" class="noVNC_button"
+                    title="Active Mouse Button"/>
                 <input type="image" alt="Middle mousebutton" src="app/images/mouse_middle.svg"
-                    id="noVNC_mouse_button2" class="noVNC_button" />
+                    id="noVNC_mouse_button2" class="noVNC_button"
+                    title="Active Mouse Button"/>
                 <input type="image" alt="Right mousebutton" src="app/images/mouse_right.svg"
-                    id="noVNC_mouse_button4" class="noVNC_button" />
+                    id="noVNC_mouse_button4" class="noVNC_button"
+                    title="Active Mouse Button"/>
                 <input type="image" alt="Keyboard" src="app/images/keyboard.svg"
                     id="noVNC_keyboard_button" class="noVNC_button"
                     value="Keyboard" title="Show Keyboard" />
@@ -82,17 +86,22 @@
             <!-- Extra manual keys -->
             <div id="noVNC_extra_keys">
                 <input type="image" alt="Extra keys" src="app/images/toggleextrakeys.svg"
-                    id="noVNC_toggle_extra_keys_button" class="noVNC_button" />
+                    id="noVNC_toggle_extra_keys_button" class="noVNC_button"
+                    title="Show Extra Keys"/>
                 <div class="noVNC_vcenter">
                 <div id="noVNC_modifiers" class="noVNC_panel">
                     <input type="image" alt="Ctrl" src="app/images/ctrl.svg"
-                        id="noVNC_toggle_ctrl_button" class="noVNC_button" />
+                        id="noVNC_toggle_ctrl_button" class="noVNC_button"
+                        title="Toggle Ctrl"/>
                     <input type="image" alt="Alt" src="app/images/alt.svg"
-                        id="noVNC_toggle_alt_button" class="noVNC_button" />
+                        id="noVNC_toggle_alt_button" class="noVNC_button"
+                        title="Toggle Alt"/>
                     <input type="image" alt="Tab" src="app/images/tab.svg"
-                        id="noVNC_send_tab_button" class="noVNC_button" />
+                        id="noVNC_send_tab_button" class="noVNC_button"
+                        title="Send Tab"/>
                     <input type="image" alt="Esc" src="app/images/esc.svg"
-                        id="noVNC_send_esc_button" class="noVNC_button" />
+                        id="noVNC_send_esc_button" class="noVNC_button"
+                        title="Send Escape"/>
                 </div>
                 </div>
             </div>