December 2010
Beginner
455 pages
9h 37m
English
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Chapter 12. Scripting Frames
The previous two lessons focused on the window object — a programmatic representation of the browser window. The browser window typically contains one web page, and thus only one window object. The <frameset/> element, however, allows web developers to divide a browser window into two or more smaller window panes.
Each of these panes is itself a browser window, and as such has a full-fledged window object. In fact, some browsers allow you to move and resize an individual frame with the moving and resizing methods you learned in Lesson 11 (it is highly recommended that you do not use these methods on a frame).
Arguably the most important aspect of dealing with frames as a JavaScript developer is accessing code and objects across frames. Over the course of this lesson you'll see many similarities between cross-frame scripting and cross-window scripting.
FRAMES AND THE WINDOW OBJECT
The easiest way to delve into frame scripting is with a demonstration. The first item you'll look at is the frameset page. Its HTML is as follows:
<html>
<head>
<title>Frameset Page</title>
</head>
<frameset rows="50%,*">
<frame name="frmTop" src="frame_top.htm" />
<frame name="frmBottom" src="frame_bottom.htm" />
</frameset>
</html>This is a simple frameset page: It divides the page into upper and lower regions. The frame on top, named frmTop, loads the frame_top.htm page into it, and the bottom frame, frmBottom, loads frame_bottom.htm. Make note of each frame's name, as they are ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.