The onload is placed into the html that is returned by the cgi code code run when you pres s the button

User clicks on button to do some processing.

doesnt that call a cgi script? that does the processing? It would be rather strange for the javascript to call a process that runs on the users machine rather then on the server where the database lives

When a routine finishes

Doesnt routine that send back html to the iframe? it is in that html that the onload runs

In reply to Re^7: send windowmessage from cgi back to form that called the cgi by huck
in thread send windowmessage from cgi back to form that called the cgi by tultalk

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