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Tip of the Day
Language: Client Scripting
Expertise: Beginner
Aug 11, 2000

JavaScript Variable Declaration

Question:
I am new to JavaScript, but familiar with a variety of other languages. I don't quite understand what the following variable declarations do:
ns4 = (document.layers)? true:false
ie4 = (document.all)? true:false
Is it just setting up a boolean variable?

Answer:
Yes, those are just boolean values.

This is the same thing as saying:

if (document.layers) {
    ns4 = true
}
else {
    ns4 = false
}
However, keep in mind that the next version of Netscape won't support document.layers or document.all, so both of these fields will be set to false.
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