It's easy to get confused about which target to examine when writing an event handler. This article should clarify the use of the target properties.

DOM Gecko NeedsContent NeedsExample NeedsHelp

The original target of the event before any retargetings. (Mozilla-specific)

API DOM Gecko NeedsExample NeedsHelp Non-standard Property

An event handler for abort events sent to the window. (Not available with Firefox 2 or Safari)

API NeedsContent NeedsHelp NeedsUpdate Property Reference Référence Window