JavaScript Examples Bible - UserWorks Technologies

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JavaScript Examples Bible: The Essential Companion to JavaScript Bible
In the next example, the user is asked to approve the addition of a URL to the
Favorites list. The user can follow the normal procedure for filing the item in a
folder in the list.
external.AddFavorite(“http://www.dannyg.com/update6.html”,
“JSBible 4 Support Center”)
The final example assumes that a user makes a choice from a SELECT list of items.
The onChange event handler of the SELECT list invokes the following function to navigate
to a fictitious page and locate listings for a chosen sports team on the page.
function locate(list) {
var choice = list.options[list.selectedIndex].value
external.NavigateAndFind(“http://www.collegesports.net/scores.html”, choice,
“scores”)
}
frames
windowObject.frames
NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5
Compatibility ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
Example
Listings 16-7 and 16-8 demonstrate how JavaScript treats values of frame references
from objects inside a frame. The same document is loaded into each frame. A
script in that document extracts info about the current frame and the entire frameset.
Figure 2-1 shows the results after loading the HTML document in Listing 16-7.
Listing 16-7: Framesetting Document for Listing 16-8
window.frames property
A call to determine the number (length) of frames returns 0 from the point of
view of the current frame referenced. That’s because each frame here is a window
that has no nested frames within it. But add the parent property to the reference,
and the scope zooms out to take into account all frames generated by the parent
window’s document.