Layer (HTML tag)

Layer (HTML tag)

Layers were the core of a method of dynamic HTML programming specific to Netscape 4. Each layer was treated as a separate document object in JavaScript. The content could be either included in the same file within the non-standard <layer> tag (or any other tag with the positioning set to "absolute" via CSS, loaded from a separate file with <layer src="URL HERE"> or <div src="URL HERE">, or generated via JavaScript with the new Layer(), the content would then be filled with "layer".document.write().

In modern browsers, this functionality is provided by using an absolutely-positioned div, or, for loading the content from an external file, an IFrame.

References

* Netscape: Dynamic HTML in Netscape Communicator ( [http://web.archive.org/web/*/developer.netscape.com/docs/manuals/communicator/dynhtml/index.htm On the Internet Archive] )
* Eric Krock, " [http://www.stopbadtherapy.com/standards.shtml Transitioning from Proprietary DOMs and Markup to W3C Standards: Enhancing Pages That Use LAYER, document.layers, and document.all to Support Standards] "


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