JavaScript Examples Bible - UserWorks Technologies

Chapter 1 ✦ Generic HTML Element Objects (Chapter 15)
Example
Use The Evaluator (Chapter 13 in the JavaScript Bible) to experiment with the
tags() method. Enter the following statements one at a time into the upper text
box and study the results:
document.all.tags(“DIV”)
document.all.tags(“DIV”).length
myTable.all.tags(“TD”).length
Because the tags() method returns an array of objects, you can use one of
those returned values as a valid element reference:
document.all.tags(“FORM”)[1].elements.tags(“INPUT”).length
urns(“behaviorURN”)
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Example
In case the urns() method is reconnected in the future, you can add a button
and function to Listing 15-19b that reveals whether the makeHot.htc behavior is
attached to the myP element. Such a function looks like this:
function behaviorAttached() {
if (document.all.urns(“makeHot”)) {
alert(“There is at least one element set to \’makeHot\’.”)
}
}
Event handlers
onActivate
onBeforeDeactivate
onDeactivate
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Compatibility ✓
Example
You can modify Listing 15-34 later in this chapter by substituting onActivate for
onFocus and onDeactivate for onBlur.
95
elementObject.onActivate