TH
Description
The TH element defines a header cell as part of the TABLE construct.
The browser should render the table to cause some difference between
TH elements and TD elements.
Both TH and TD elements can exist in any
one of the three table sections: THEAD, TFOOT, or TBODY.
Minimum Attributes
<TH>
All Possible Attributes
<TH
LANG="..."
DIR=ltr|rtl
ID="..."
CLASS="..."
AXIS="..."
AXES="..."
NOWRAP
ROWSPAN=value
COLSPAN=value
ALIGN=left|right|center|justify|char|decimal
CHAR="..."
CHAROFF="..."
DP="..."
VALIGN=top|middle|bottom|baseline
WIDTH=value
BGCOLOR="...">characters...</TH>
Elements Allowed Within...
members of group
Allowed In Content Of...
Variations
The TH element is part of the proposed TABLE construct.
A browser is to assume the table cell ends with the beginning
of the next table cell or the beginning of another table row
or the end of the enclosing TABLE, THEAD, TFOOT, or TBODY element
and thus a closing tag is not required.
This element is an extension in Netscape 1.1 and MS Internet Explorer 2.0.
Most browsers typically render the TH element in bold font,
but otherwise identical to TD elements.
The values justify|char for the ALIGN attribute
are new and are not widely implemented.
The table proposal states that a browser may display
ALIGN=justify the same as the default
ALIGN=left if it lacks support for text justification.
The AXIS and AXES attributes for cells provide a means for defining
concise labels for cells, either for speech rendering, or for
database field names.
The attribute AXIS defaults to the cell contents.
The AXES is a comma separated list of axis names which together
identify the row and column headers that pertain to this cell.
The NOWRAP attribute will suppress word wrap in the cell.
The ROWSPAN and COLSPAN attributes define the integer number of rows and
columns spanned by the cell. A value of zero for either implies the
cell spans from this cell to the end of the table.
The attribute DP is from an earlier version of the proposal and
was used with a value of decimal on the ALIGN attribute.
It has been replaced with the CHAR and CHAROFF attributes
used when ALIGN=char.
CHAR specifies a single character to be used for alignment, and
defaults to the decimal point in the current language.
CHAROFF specifies the offset, in the DIR direction, to the first
occurrence of the CHAR character on each line. If a line doesn't
include the CHAR character, it is to end at the CHAROFF position.
The default value for CHAROFF is either 50% or whatever will cause
the CHAR characters in all cells with a declared CHAR in a column to align.
The default units is pixels, but may be specified by a suffix on the number.
The standard defined units suffixes include:
pt=points,
pi=picas,
in=inches,
cm=centimeters,
mm=millimeters,
em=em units,
px=screen pixels.
In addition the suffix of a percentsign may be used to specify the
percentage offset within the cell.
The VALIGN attribute defines the vertical alignment of the cell contents.
The ALIGN, CHAR and CHAROFF attribute values may be inherited from
other table elements in the following order:
cells < columns < column groups < rows < row groups < default.
The VALIGN, LANG and DIR attribute values may be inherited from
other table elements in the following order:
cells < rows < row groups < columns < column groups < table < default.
The WIDTH attribute is a Netscape extension.
The BGCOLOR attribute is a MS Internet Explorer 2.0 extension.
Internet Explorer accepts either an "#rrggbb" number or
the following color names:
Black, Maroon, Green, Olive, Navy, Purple, Teal, Gray, Silver, Red, Lime,
Yellow, Blue, Fuchsia, Aqua, White.
