JavaScript Examples Bible - UserWorks Technologies

6
JavaScript Examples Bible: The Essential Companion to JavaScript Bible
behaviorUrns
NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5
Compatibility ✓ ✓
Example
The following function is embedded within a more complete example of
IE/Windows HTML behaviors (Listing 15-19 in this chapter). It reports the length of
the behaviorUrns array and shows — if the values are returned — the URL of the
attached behavior.
function showBehaviors() {
var num = document.all.myP.behaviorUrns.length
var msg = “The myP element has “ + num + “ behavior(s). “
if (num > 0) {
msg += “Name(s): \r\n”
for (var i = 0; i < num; i++) {
msg += document.all.myP.behaviorUrns[i] + “\r\n”
}
}
alert(msg)
}
canHaveChildren
NN2 NN3 NN4 NN6 IE3/J1 IE3/J2 IE4 IE5 IE5.5
Compatibility ✓ ✓
Example
Listing 15-2 uses color to demonstrate the difference between an element that can
have children and one that cannot. The first button sets the color style property of
every visible element on the page to red. Thus, elements (including the normally
non-childbearing ones such as HR and INPUT) are affected by the color change.
But if you reset the page and click the largest button, only those elements that can
contain nested elements receive the color change.
Listing 15-2: Reading the canHaveChildren Property
canHaveChildren Property
elementObject.canHaveChildren