Frames are generated by three things: FRAMESET tags, FRAME
tags, and Frame Documents.
FRAME DOCUMENT
A Frame Document has a basic structure very much like your normal HTML document, except
the BODY container is replaced by a FRAMESET container which describes the
sub-HTML documents, or Frames, that will make up the page.
<HTML>
<HEAD>
</HEAD>
<FRAMESET>
</FRAMESET>
</HTML>
FRAME SYNTAX
Frame syntax is similar in scope and complexity to that used by tables, and has
been designed to be quickly processed by Internet client layout engines.
<FRAMESET>
- This is the main container for a Frame. It has 2 attributes ROWS and COLS.
A frame document has no BODY, and no tags that would normally be placed in the BODY can
appear before the FRAMESET tag, or the FRAMESET will be ignored. The FRAMESET tag has a
matching end tag, and within the FRAMESET you can only have other nested FRAMESET tags,
FRAME tags, or the NOFRAMES tag.
- ROWS="row_height_value_list"
- The ROWS attribute takes as its value a comma separated list of values. These values can
be absolute pixel values, percentage values between 1 and 100, or relative scaling values.
The number of rows is implicit in the number of elements in the list. Since the total
height of all the rows must equal the height of the window, row heights might be
normalized to achieve this. A missing ROWS attribute is interpreted as a single row
arbitrarily sized to fit.
- Syntax of value list.
- value
- A simple numeric value is assumed to be a fixed size in pixels. This is the most
dangerous type of value to use since the size of the viewer's window can and does vary
substantially. If fixed pixel values are used, it will almost certainly be necessary to
mix them with one or more of the relative size values described below. Otherwise the
client engine will likely override your specified pixel value to ensure that the total
proportions of the frame are 100% of the width and height of the user's window.
- value%
- This is a simple percentage value between 1 and 100. If the total is greater than 100
all percentages are scaled down. If the total is less than 100, and relative-sized
frames exist, extra space will be given to them. If there are no relative-sized frames,
all percentages will be scaled up to match a total of 100%.
- value*
- The value on this field is optional. A single '*' character is a
"relative-sized" frame and is interpreted as a request to give the frame
all remaining space. If there exist multiple relative-sized frames, the remaining space is
divided evenly among them. If there is a value in front of the '*', that frame gets that
much more relative space. "2*,*" would give 2/3 of the space to the first frame,
and 1/3 to the second.
- Example for 3 rows, the first and the last being smaller than the center row:
<FRAMESET ROWS="20%,60%,20%">
Example for 3 rows, the first and the last being fixed height, with the remaining space
assigned to the middle row:
<FRAMESET ROWS="100,*,100">
- COLS="column_width_list"
- The COLS attribute takes as its value a comma separated list of values that is of the
exact same syntax as the list described above for the ROWS attribute.
The FRAMESET tag can be nested inside other FRAMESET tags. In this case the complete
subframe is placed in the space that would be used for the corresponding frame if this had
been a FRAME tag instead of a nested FRAMESET. -
- <FRAME>
- This tag defines a single frame in a frameset. It has 6 possible attributes: SRC,
NAME, MARGINWIDTH, MARGINHEIGHT, SCROLLING, and NORESIZE.
The FRAME tag is not a container so it has no matching end tag.
- SRC="url"
- The SRC attribute takes as its value the URL of the document to be displayed in this
particular frame. FRAMEs without SRC attributes are displayed as a blank space the size
the frame would have been.
- NAME="window_name"
- The NAME attribute is used to assign a name to a frame so it can be targeted by links in
other documents (These are usually from other frames in the same document.) The NAME
attribute is optional; by default all windows are unnamed.
- Names must begin with an alphanumeric character.
- Named frames can have their window contents targeted with the new TARGET
attribute.
- MARGINWIDTH="value"
- The MARGINWIDTH attribute is used when the document author wants some control of the
margins for this frame. If specified, the value for MARGINWIDTH is in pixels.
Margins can not be less than one-so that frame objects will not touch frame edges-and can
not be specified so that there is no space for the document contents. The MARGINWIDTH
attribute is optional; by default, all frames default to letting the browser decide on an
appropriate margin width.
- MARGINHEIGHT="value"
- The MARGINHEIGHT attribute is just like MARGINWIDTH above, except it controls the upper
an lower margins instead of the left and right margins.
- SCROLLING="yes|no|auto"
- The SCROLLING attribute is used to describe if the frame should have a scrollbar or not.
Yes results in scrollbars always being visible on that frame. No results in
scrollbars never being visible. Auto instructs the browser to decide whether
scrollbars are needed, and place them where necessary. The SCROLLING attribute is
optional; the default value is auto.
- NORESIZE
- The NORESIZE attribute has no value. It is a flag that indicates that the frame is not
resizable by the user. Users typically resize frames by draggin a frame edge to a new
position. Note that if any frame adjacent to an edge is not resizable, that entire edge
will be restricted from moving. This will effect the resizability of other frames.The
NORESIZE attribute is optional; by default all frames are resizable.
- <NOFRAMES>
- This tag is for content providers who want to create alternative content that is
viewable by non-Frame-capable clients. A Frame-capable Internet client ignores all tags
and data between start and end NOFRAMES tags.
EXAMPLES
This example compares Frame syntax and TABLE syntax, and will show the HTML source
used to display the layout below.
+----------------------------------------------------------+
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| |-----------------------------+
| | |
| | |
| | |
| | |
+----------------------------| |
| | |
| | |
| | |
| | |
| |-----------------------------+
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
+----------------------------------------------------------+
THE ABOVE LAYOUT USING TABLES
<TABLE WIDTH="100%" HEIGHT="100%" BORDER>
<TR><TD
ROWSPAN=2>CELL1</TD><TD>CELL2</TD></TR>
<TR><TD ROWSPAN=2>CELL3</TD></TR>
<TR><TD ROWSPAN=2>CELL4</TD></TR>
<TR><TD>CELL5</TD></TR>
</TABLE>
View the table.
THE ABOVE LAYOUT USING FRAMES
<FRAMESET COLS="50%,50%">
<FRAMESET ROWS="50%,50%">
<FRAME SRC="cell.html">
<FRAME SRC="cell.html">
</FRAMESET>
<FRAMESET ROWS="33%,33%,33%">
<FRAME SRC="cell.html">
<FRAME SRC="cell.html">
<FRAME SRC="cell.html">
</FRAMESET>
</FRAMESET>
View the frame.
THE ABOVE LAYOUT USING NOFRAMES INFO
<FRAMESET COLS="50%,50%">
<NOFRAMES>
<h1 align=center><blink>Frame ALERT!</blink></h1>
<p>
This document is designed to be viewed using <b>Netscape 2.0</b>'s
Frame features. If you are seeing this message, you are using
a frame <i>challenged</i> browser.
</p>
<p>
A <b>Frame-capable</b> browser can be gotten from
<a href=/>Netscape Communications</a>.
</p>
</NOFRAMES>
<FRAMESET ROWS="50%,50%">
<FRAME SRC="cell.html">
<FRAME SRC="cell.html">
</FRAMESET>
<FRAMESET ROWS="33%,33%,33%">
<FRAME SRC="cell.html">
<FRAME SRC="cell.html">
<FRAME SRC="cell.html">
</FRAMESET>
</FRAMESET>
View the frame. |
