onAfterUpdate
The instruction(s) to be executed are placed within quotes. This event handler will execute the instruction(s) when the transfer of data from an elementto a data source has completed.

The following example will display text of your choosing in a message box when the transfer of data from an elementto a data source has completed:
onAfterUpdate="msgWindow.document.write('-- Insert text message here --')"
This Event Handler is used with the following:

APPLET
AREA
BODY
BUTTON
CAPTION
DIV

FIELDSET
IMG
MARQUEE
OBJECT
SELECT
TABLE
TD
TEXTAREA
TH