724 Part III . Document Objects Reference Listing 29-5: Event Bubbling Demonstration

Event Bubbles

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You can try this listing in IE4+ and even NN6, because the latter observes event bubbling. But you will notice differences in the precise propagation among IE4+/Windows, IE4+/Macintosh, and NN6. But first, notice that after you click the button in Listing 29-5, the event first fires at the target: the button. Then the event bubbles upward through the HTML containment to fire at the enclosing FORM element; next to the enclosing BODY element; and so on. Where the differences occur are after the BODY element. Table 29-1 shows the objects for which event handlers are defined in Listing 29-5 and which objects have the clickevent bubble to them in the three classes of browsers. Table 29-1 Event Bubbling Variations for Listing 29-5 Event Handler Location IE4+/Windows IE4+/Macintosh NN6 BUTTON yes yes yes FORM yes yes yes
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