th
The th element is used as table header for a row or column. The header itself is displayed as bold.

attributes

id
Provides an element with a unique name within a single deck.
class
Affiliates an element with one or more classes.
abbr
This attribute is ignored.
align
Specifies cell alignment with respect to the baseline of the text. It has five possible values: right, left, center, justify orjust.
valign
Specifies vertical cell alignment with respect to the baseline of the text. It has three possible values: top, middle or bottom.
nowrap
Specifies no wrapping text.
width
Specifies the width of the table. If specified as a percentage value, the resulting size is based on the available horizontal space
height
Specifies the height of the table. If specified as a percentage value, the resulting size is based on the available vertical space.
bgcolor
Specifies color, value must be given by name or by 6-digit hex.
Names are:
black, white, aqua, blue, fuchsia, gray, green, lime, maroon, navy, olive, purple, red, silver, teal, yellow
rowspan
Specifies the number of spanned rows.
title
Specifies a brief text string identifying the table. This attribute is ignored.