docs: add new iframe layout
diff --git a/docs/shading.html b/docs/shading.html
index 17cf35c..c501e96 100644
--- a/docs/shading.html
+++ b/docs/shading.html
@@ -7,6 +7,13 @@
 </head>
 <body>
 
+<div class="header">
+  <h1>The Mesa 3D Graphics Library</h1>
+</div>
+
+<iframe src="contents.html"></iframe>
+<div class="content">
+
 <h1>Shading Language Support</h1>
 
 <p>
@@ -253,5 +260,6 @@
 The Mesa demos repository also has some good GLSL tests.
 </p>
 
+</div>
 </body>
 </html>