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HTML Meta Elements Summary

BASEFONT Element: Base Font for Document
BGSOUND Element: Background Audio/Sound (Internet Explorer)
MAP Element: Client-side Imagemap
- AREA Element: Imagemap Data

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BASEFONT Element: Base Font for Document

Usage:                <BASEFONT>
Can Contain:       empty
Can Be Inside:    ADDRESS, BLOCKQUOTE, BODY, CENTER, DIV, FORM, PRE,
                           DD, DT, LI, P, TD, TH, Hn,
                           A, CAPTION, character highlighting
Attributes:           COLOR, FACE, SIZE

BASEFONT specifies the default font characteristics--primarily font size--for all text following BASEFONT. BASEFONT should ideally appear prior to any displayed text in the BODY of the document. Localized changes to the font size should be implemented using the FONT element or-better yet-- by using SPAN and stylesheets.

Attributes:
- COLOR="#rrggbb", "color" (optional) (Internet Explorer only) Specifies the default text color, either as an RGB value or as a named color.
- FACE="string" (optional) (Internet Explorer only) Specifies the default font face for the document, either as a font name or as a sequence of comma-separated font names. The browsers will try all fonts from left to right, and will choose the first supported font.
- SIZE="#number" (optional) Specifies the default font sizes, as a value from 1 to 7. Default is 3. Note that BASEFONT does not affect the size of text inside heading elements.

Examples: <BASEFONT SIZE="4">

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BGSOUND Element: Background Audio/Sound (Internet Explorer only)

Usage:                <BGSOUND>
Can Contain:       empty
Can Be Inside:    unclear: can apparently appear inside the HEAD, or inside any non-empty BODY element
Attributes:           LOOP, SRC

BGSOUND inserts an inline audio snippet--the URL location of the audio file is specified by the SRC attribute. By default

Attributes:
- LOOP="number", "infinite" (optional) Specifies the number of times playing the audio file. LOOP=-1, or LOOP="infinite" instruct the browser plays continuously the sound file until the user selects another document.
- SRC="url" (mandatory) Specifies the URL location of the sound file.

Examples:
- Example 1: BGSOUND

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Example 1: BGSOUND

This is the BgsoundEx1.htm file:

<HTML>
<HEAD>
<TITLE>HTML BGSOUND Example 1</TITLE>
</HEAD>
<BODY>
<EMBED SRC="sounds/MozartNo40.rmi" HEIGHT="1" WIDTH="1" AUTOSTART="true" HIDDEN="true">
<NOEMBED>
<BGSOUND SRC="sounds/MozartNo40.rmi" LOOP="infinite">
</NOEMBED>

<P>HTML BGSOUND Example 1: CLOSE THE WINDOW TO STOP THE MUSIC.</P>

</BODY>
</HTML>

Example 1 Output:

Click here to pop-up a new window with HREF="Bgsound.htm" to play the sound file sounds/MozartNo40.rmi".

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MAP Element: Client-Side Imagemap Database

Usage:                <MAP>...</MAP>
Can Contain:       AREA
Can Be Inside:    ADDRESS, BLOCKQUOTE, BODY, CENTER, DIV, FORM, PRE,
                           DD, DT, LI, P, TD, TH, Hn,
                           A, CAPTION, character highlighting
Attributes:           NAME

MAP contains client-side imagemap mapping data. Each MAP must be uniquely identified by a NAME attribute. For example, <MAP NAME="map1">. Such a map is referenced from an IMG element using USEMAP attribute, for example:
<IMG SRC="image.gif ... USEMAP="map1">
A single document can contain any number of MAP elements. MAP need not be in the same document as the IMG from which it is referenced. However, no browsers currently support such external MAP elements. Example:
<IMG SRC="image.gif ... USEMAP="http://some.where.com/other.htm#map1">
MAP must contain AREA elements. AREA elements mark out the regions of an image and the URLs to which these regions are linked.

Attributes:
- NAME="name" (mandatory) Specified the unique name of the MAP.

Examples:
- Click here to see examples of using MAP.

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AREA Element: Client-Side Imagemap Mapping Area

Usage:                <AREA>
Can Contain:       empty
Can Be Inside:    MAP
Attributes:           ALT, COORDS, HREF, NOHREF, SHAPE, TARGET

AREA specifies shaped regions in a mapped image and the URLs associated with the shape. AREA can overlap--in this case the browser searches sequentially down through the different AREA elements, and selects the first acceptable entry.

Attributes:
- ALT="string" (optional) Give a text description of the mapped region that can be presented to the user as a description of the linked region; or it can be used by browsers that cannot display the image.
- COORDS="x1,y1,x2,y2...) (mandatory) Specifies the comma-separated coordinates of the defined SHAPE, as a sequence of (x,y) pairs--the required number of pairs depends on the specified SHAPE. Coordinates are specified in pixels measured from the upper left-hand corner of the image.
  - SHAPE="rect" COORDS="x1,y1,x2,y2" --where (x1,y1) are the coordinates of the upper left-hand corner, and (x2,y2) are the coordinates of the lower right-hand corner
  - SHAPE="circle" COORDS="xc,yc,r" --where (xc,yc) is the circle center, and (r) is the circle radius.
  - SHAPE="poly" COORDS="x1,y1,x2,y2...xn,yn" --where (x1,y1)...(xn,yn) are the coordinates of the vertices of the polygon.
  - SHAPE="default" No coordinates are specified. This is the default behavior if the mouse is click in an undefined region.
- NOHREF (one of HREF or NOHREF is required) Indicates that the browser should take no action if the user clicks inside the specified region, and should continue display the current document.
- HREF="url" (one of HREF or NOHREF is required) Specifies the URL to which the region is linked. Note that partial URLs are evaluated relative to the URL of the MAP file--and recall that the MAP need not be in the same document as the IMG element referencing the MAP. Similarly, if the document containing the MAP element also contains a BASE element, relative URLs specified by the HREF will be evaluated relative to the base URL.
- SHAPE="rect", "circle", "poly", "default" (optional) Indicates the type of shape being specified in the AREA element. If SHAPE is not specified, a browser assumes the default SHAPE="rect". "Default" specifies no area, and corresponds to the default behavior should none of the specified regions be selected.
- TARGET="string" (optional) (Netscape and Internet Explorer only) Specifies the name of the frame or window to which the data returned by the submitted form should be sent. This attribute is used to the same purpose with the A (anchor) element.

Examples:
- Click here to see examples of using AREA.

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