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codeBase attribute (applet, object)

Browser support:
Sets the base location that relative URLs specified in the classid, data and archive attributes are relative to.
JavaScript page for this attribute: codeBase. You can find other example(s) there.

Possible values:

String that sets the base URL to use.
The URL can be an absolute or relative path as well. Relative paths are relative to the base URL. The base URL is the location of the current document, but it can be overridden by the base tag.
The URL may contain version information at the end of the value for object elements. In that case, if the component required by the object element does not exist on the client computer or it is older than the version specified by the codeBase attribute, browsers try to download the required one.
The form of the version information is URL#version='high-major-number','low-major-number','high-minor-number', 'low-minor-number'. See Example 2 for details.
Default: this attribute has no default value.

Example HTML code 1:

This example illustrates the use of the code and the codebase attributes for object tags:
<object type="application/x-java-applet" code="HelloWorld.class" 
        codebase="/external/examples/common/java/" width="200px" height="50px">
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Example HTML code 2:

This example illustrates the use of the codeBase attribute with Macromedia Flash Player.
It clearly focuses on cross-browser support only, and it isn’t standards-compliant, but there isn't any standards-compliant cross-browser way to embed a Flash application into a document with Flash Player detection.
<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" width="300" height="120" 
    <param name="movie" value="flash.swf" />
    <!-- Optional params -->
    <param name="play" value="true" />
    <param name="loop" value="true" />
    <param name="quality" value="high" />
    <!-- END Optional -->
    <embed src="flash.swf" width="300" height="120" play="true" 
        loop="true" quality="high" 
        pluginspage="" /> 
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