Section 11.5. The noframes Tag | Data Networks: Routing, Security, and Performance Optimization

11.5. The <noframes> Tag

A frame document has no <body> . It must not because the browser ignores any frame tags if it finds any <body> content before it encounters the first <frameset> tag. A frame document, therefore, is all but invisible to any nonframes-capable browser. The <noframes> tag gives some relief to the frames -disabled.

<noframes>

Function	Supplies content for nonframes-capable browsers
Attributes	`class` , `dir` , `id` , `lang` , `onClick` , `onDblClick` , `onKeyDown` , `onKeyPress` , `onKeyUp` , `onMouseDown` , `onMouseMove` , `onMouseOut` , `onMouseOver` , `onMouseUp` , `style` , `title`
End tag	`</noframes>` ; sometimes omitted in HTML
Contains	body_content
Used in	frameset_content

You should use the <noframes> tag only within the outermost <frameset> tag of a frame document. Content between the <noframes> tag and its required end tag ( </noframes> ) is not displayed by any frames-capable browser but is displayed in lieu of other contents in the frame document by browsers that do not handle frames. The content of the <noframes> tag can be any normal body content, including the <body> tag itself.

Although this tag is optional, experienced authors typically include the <noframes> tag in their frame documents with content that warns nonframes-capable browser users that they're missing the show. And smart authors give those users a way out, if not direct access to the individual documents that make up the frame document contents.

Remember our first frame example in this chapter? Figure 11-5 shows what happens when that frame document gets loaded into an old version of Mosaic.

Figure 11-5. A <noframes> message in a nonframes-capable browser

The HTML to produce this message looks like this:

 <noframes>   Sorry, this document can be viewed only with a   frame-capable browser. Go to the <a href="frame1.html">   first HTML document</a> in the set. </noframes>

<noframes> works because most browsers are extremely tolerant of erroneous tags and incorrect documents. A nonframes browser simply ignores the frame tags. What's left, then, is the content of the <noframes> tag, which the browser dutifully displays.

If your browser strictly enforces some version of HTML or XHTML that does not support frames, it may simply display an error message and refuse to display the document, even if it contains a <noframes> tag.

11.5.1. <noframes> Attributes

No attributes are specific to the <noframes> tag, but you can use any of the 16 standard attributes: class and style for style management, lang and dir for language type and display direction, title and id for titling and naming the enclosed content, and any of the event attributes for user -activated JavaScript processing within the <noframes> tag. [The dir attribute, 3.6.1.1] [The lang attribute, 3.6.1.2] [The id attribute, 4.1.1.4] [The title attribute, 4.1.1.5] [Inline Styles: The style Attribute, 8.1.1] [Style Classes, 8.3] [JavaScript Event Handlers, 12.3.3]