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When you use event capturing | | ---------------| |----------------- | element1 | | | | -----------| |----------- | | |element2 \ / | | | ------------------------- | | Event CAPTURING | ----------------------------------- the event handler of element1 fires first, the event handler of element2 fires last. Event bubbling When you use event bubbling / \ ---------------| |----------------- | element1 | | | | -----------| |----------- | | |element2 | | | | | ------------------------- | | Event BUBBLING | ----------------------------------- the event handler of element2 fires first, the event handler of element1 fires last.

addEventListener() method explained on the Advanced models page. If its last argument is true the event handler is set for the capturing phase, if it is false the event handler is set for the bubbling phase.

In the Microsoft model you must set the event’s cancelBubble property to true. window.event.cancelBubble = true In the W3C model you must call the event’s stopPropagation() method. e.stopPropagation()

Closure A "closure" is an expression (typically a function) that can have free variables together with an environment that binds those variables (that "closes" the expression).

Example 2: Associating Functions with Object Instance Methods

Rainbow for Firebug 0.6 by Antonin Hildebrand experimental Categories Web Development Javascript syntax highlighting for Firebug