Fixed three broken links.

Author: bert-github

css-2010/Overview.src.html

@@ -1299,13 +1299,13 @@ <h3 id="properties">Property Index</h3>
     <tr><th scope=row>
       <a href="http://www.w3.org/TR/CSS21/visuren.html#propdef-z-index"><code>z-index</code></a>
       <td>auto |
-          <a href="syndata.html#value-def-integer">&lt;integer&gt;</a> |
-          <a href="cascade.html#value-def-inherit">inherit</a>
+          <a href="http://www.w3.org/TR/CSS21/syndata.html#value-def-integer">&lt;integer&gt;</a> |
+          <a href="http://www.w3.org/TR/CSS21/cascade.html#value-def-inherit">inherit</a>
       <td>auto
       <td>positioned elements
       <td>no
       <td>&nbsp;
-      <td><a href="media.html#visual-media-group">visual</a>
+      <td><a href="http://www.w3.org/TR/CSS21/media.html#visual-media-group">visual</a>
   </tbody>
 </table>