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Embedding Sound and Video
There are two tags that are used to embed multimedia files in web pages
and . The tag was introduced by Netscape to enable files that require plug-ins to view within a web page. The tag indicates that Netscape-style plug-ins (multimedia primarily) should be used to view embedded media. Unfortunately, isn`t sanctioned by the World Wide Web Consortium (W3C) and can`t be found in the official HTML standard.
The other tag, , is officially sanctioned by the W3C. It was originally used by Internet Explorer to allow users to load ActiveX controls within a page. I`ll talk about them more a bit later. Since then, browsers that use Netscape-style plug-ins have also added support for the tag. The tag is only necessary for older browsers that use Netscape-style plug-ins (like old versions of Netscape).
Using the Element
Despite the fact that isn`t in the HTML standard, Microsoft and Netscape continue to support it, mainly because many pages out there that still use it. The tag has no closing tag; however, it does support a number of attributes.
Unfortunately, despite the fact that most browsers support , they only have a handful of attributes in common. The good news is that each web browser ignores the attributes it doesn`t understand, enabling you to include as many different attributes as you like. Because of this, it`s best to rely on a set of attributes that will work in all cases, and use them religiously, including the others for added value. And, because the tag won`t validate anyway, you don`t have to worry about complying with standards with regard to the attributes either.
Let`s explore the attributes you absolutely need to use the element.
tags that follow:
Input
attributes supported by Internet Explorer.
Table 11.1. Attributes Used in Internet Explorer
Attribute
align
class
height
id
name
pluginspage
Description
Aligns the element in relation to the web page. Allowable values are absbottom, absmiddle, baseline, bottom, left, middle, right, texttop, and top. This is the equivalent of the attributes supported by Mozilla Firefox.
Table 11.2. Attributes Used in Mozilla Firefox
Attribute
src
type
pluginspage
pluginurl
align
border
frameborder
height
width
units
hidden
hspace
vspace
name
palette
Description
The URL file location.
The MIME type of the multimedia file indicated by the src attribute.
A URL pointing to a web page that has instructions for installing the required plug-in.
A URL to a Java Archive (JAR) file.
Aligns the element in relation to the web page. Allowable values are left, right, top, and bottom.
The width of a border drawn around the element.
Does not draw a border around the element when set to no.
The height of the element.
The width of the element.
The units used to measure the height and width. Pixels are the default unit of measurement.
Hides the element when set to true and displays it when set to false, which is the default value.
The horizontal margin around the element.
The vertical margin around the element.
The name of the plug-in required to play the file.
For use in Windows only. foreground makes the plug-in use the foreground palette, whereas background (the default) makes the plug-in use the background palette.
In addition to these attributes, additional attributes might be available for specific plug-ins, such as the
file:///G|/1/0672328860/ch11lev1sec3.html (4 von 16) [19.12.2006 13:49:25]
Macromedia Flash Player.
Finally, you can include the noembed element to provide support for visitors who do not have a web browser that can display plug-ins:
<![CDATA[This Web page requires a browser that can display objects.]]>
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