Align text in a table header

Question

It seems align is not working for the th element. Here is my HTML:

Answer 1

For me none of the above worked. I think it is because I have two levels of header and a fixed width on level 1. So I couldn't align the text inside the corresponding columns on level 2.

+---------------------------+
|           lvl 1           |
+---------------------------+
| lvl 2 col a | lvl 2 col b |
+---------------------------+

I had to use the combination of width:auto and text:align-center :

lvl 2 col a
lvl 2 col b