I've lost my ability to change surface materials in Blender 2.71

Under the materials button, there is no long a surface tab to which I can change it to say glass or diffuse. The menu I do have is

Preview
Diffuse
Specular
Shading
Transparency
Mirror
Subsurface Scatter - etc

How can I get my Surface tab back?


Use the appropriate render engine for the type of materials you want to use.

Change render engine from the drop down list at the top of the blender interface