JavaScript 2.0-The Complete Reference, Second ... - freecodingtutorial

Figure B-4: The Internet Explorer 3 object model
Netscape 4
Netscape 4 adds the first primitive DHTML capabilities by exposing the proprietary
element to scripts. This browser also has a more robust event model where events begin at the
top of the hierarchy and trickle down to the target element, affording intervening objects the
opportunity to handle or redirect the event. While it might appear that dynamic manipulation of
style is possible, most parts of the page will not reflect changes to their style once the page has
been loaded.
This model is shown in Figure B-5.
Figure B-5: The Netscape 4 object model
Internet Explorer 4+
Internet Explorer 4 marks the point at which DHTML capabilities begin to come of age. This
browser exposes all parts of the page to scripts through the all[] collection. The event model
features event bubbling, where events begin their life cycle at the element at which they occur
and bubble up the hierarchy, affording intervening elements the opportunity to handle or
redirect the event. This model is shown in Figure B-6.