AccessibilityTest.java:12: error: header used out of sequence: <H2>
     * <h2> ... </h2>
       ^
AccessibilityTest.java:18: error: header used out of sequence: <H3>
     * <h3> ... </h3>
       ^
AccessibilityTest.java:23: error: no "alt" attribute for image
     * <img src="x.jpg">
       ^
AccessibilityTest.java:38: error: no summary or caption for table
     * <table><tr><th>head<tr><td>data</table>
                                      ^
4 errors