<th>

Atributos

Este elemento incluye los atributos globales.

Este atributo contiene una breve descripción del contenido de las celdas. Algunos agentes de usuario (e.g., a speech reader) pueden presentar esta descripción antes que el propio contenido.

Este atributo enumerado especifica cómo se tratará el alineado horizontal de la celda. Los valores posibles son:

• left: El contenido se alinea a la izquierda de la celda.
• center: El contenido se centra en la celda.
• right: El contenido se alinea a la derecha de la celda.
• justify (solo con texto): El contenido se alarga para ocupar todo el ancho de la celda.
• char (solo con texto): El contenido es alineado a un caracter dentro de <th> con el offset mínimo. Este caracter esta definido por los atributos char y charoff.

El valor por defecto cuando no se especifica este atributo es left.

Este atributo contiene una lista de cadenas separadas por espacios. Cada cadena es el id de un grupo de celdas a las que se les aplica esta cabecera.

Este atributo define el color de fondo de cada celda en una columna. Consiste en una código hexadecimal de 6 digitos, con un prefijo '#'. Este atributo puede usarse con uno de los 16 colores predefinidos:

El contenido de la celda se alinea con un caracter en el elemento <th>. Los valores típicos incluyen un punto (.) para alinear números o valores monetarios. Si no se establece align como char, el atributo es ignorado.

This attribute is used to shift column data to the right of the character specified by the char attribute. Its value specifies the length of this shift.

This attribute contains a positive integer value that indicates over how many columns a cell is extended. Its default value is 1. If its value is set to 0, the cell is extended to the last element of the <colgroup>. Values higher than 1000 are clipped down to 1000.

This attribute contains a list of space-separated strings, each corresponding to the id attributes of other <th> elements that relate to this element.

This attribute contains a positive integer value that indicates over how many rows a cells is extended. Its default value is 1. If its value is set to 0, the cell is extended to the last element of the table sections (<thead>, <tbody> or <tfoot>). Values higher than 65534 are clipped down to 65534.

This enumerated attribute defines the cells that the header (defined in the <th>) element relates to. It may have the following values:

• row: The header relates to all cells of the row it belongs to.
• col: The header relates to all cells of the column it belongs to.
• rowgroup: The header belongs to a rowgroup and relates to all of its cells. These cells can be placed to the right or the left of the header, depending on the value of the dir attribute in the <table> element.
• colgroup: The header belongs to a colgroup and relates to all of its cells.
• auto

This attribute specifies how a text is vertically aligned inside a cell. Possible values for this attribute are:

• baseline: Positions the text near the bottom of the cell and aligns it with the baseline of the characters instead of the bottom. If characters don't descend below the baseline, the baseline value achieves the same effect as bottom.
• bottom: Positions the text near the bottom of the cell.
• middle: Centers the text in the cell.
• and top: Positions the text near the top of the cell.

This attribute is used to define a recommended cell width. Additional space can be added with the cellspacing and cellpadding properties and the width of the <col> element can also create extra width. But, if a column's width is too narrow to show a particular cell properly, it will be widened when displayed.

Examples

See <table> for examples on <th>.

Especificaciones

Compatibilidad con navegadores

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See also

• Other table-related HTML Elements: <caption>, <col>, <colgroup>, <table>, <tbody>, <td>, <tfoot>, <thead>, <tr>.