<TH> and <TH>

Description:

Defines cells which contain header data.

Attributes:

abbr="text"
Gives an abbreviated form for the element within a cell. Used if the data will not fit into the cell, or for non-visual browsers.
absheight=n
Defines the absolute height of the cell in pixels.
abswidth=n
Defines the absolute width of the cell in pixels.
align=alignment
Defines the horizontal alignment of the data within the cell.

CENTER Center the text.
JUSTIFY Justify the text within the cell.
LEFT Align the text to the left.
RIGHT Align the text to the right.
background="url"
Specifies a URL containing an image to be displayed as a background for the cell. If the image is smaller than the table the image will be tiled.
bgcolor="color"
The color for the background of the cell.
bordercolor="color"
The color of the border. Ignored if the BORDER attribute is missing or zero.
bordercolordark="color"
One of the colors for a 3D border. Ignored if the BORDER attribute is missing or zero.
bordercolorlight="color"
One of the colors for a 3D border. Ignored if the BORDER attribute is missing or zero.
colspan=n
Number of columns this cell spans. Default is one. Zero means span all columns.
class=class
Indicates that the text is to be formatted using the specified class.
dir=direction
Indicates the direction (right or left) that the text is to be displayed. Useful for languages which display left to right.
event=JavaScript
When event occurs, execute the specified JavaScript.
gradangle=n
Defines the gradient angle of a cell. May be from -90 to 90 degrees. 0 is a left-to-right angle and 90 is top to bottom.
gradcolor="color"
The ending color for a gradient. The starting color is the value for bgcolor.
height="n"
Height of the cell in pixels. 
id = "name"
You can give a text a name, which allows it to be referenced and changed in a script (dynamic HTML).
lang="lang"
Indicates the language of the text within the text.
nowrap
Use this to keep data within a table from wrapping if the width of the table is exceeded.
rowspan=n
Number of rows this cell spans. Default is one. Zero means span all rows.
style="style"
Defines the style in which the text will be displayed. This overrides any style elements at an "outer" level, such as from the BODY or the Cascading Style Sheet.
title="title"
You can give a text a title if you want. This provides some additional information about the text. I'm not sure why you would want to do this, but you could.
valign=n
Specifies the vertical alignment of the data within the cells.

BASELINE First line of each element in the cell aligned with a baseline.
BOTTOM Align elements with bottom of cell.
MIDDLE Align to middle.
TOP Align to the top.
width="n"
Width of the cell in pixels or percentage. If the elements within the table are wider than the height, then the table is expanded so the elements fit. 

Examples:

<table border="1">
  <tr>
    <th>Head 1</th>
    <th colspan="2">Head 2</th>
  </tr>
    <tr>
    <td>Cell 1</td>
    <td>Cell 2</td>
    <td>Cell 3</td>
  </tr>
  <tr>
    <td>Cell 4</td>
    <td>Cell 5</td>
    <td>Cell 6</td>
  </tr>
</table>


Head 1 Head 2
Cell 1 Cell 2 Cell 3
Cell 4 Cell 5 Cell 6