Delete Button in Form

Which Aras version do you use? Using "top" is not common in the latest Innovator versions (>11SP9). And your error message "showModalDialog" indicates the good old modal dialog, which would be also outdated. Beware using old samples :-)

In Innovator 12 I would try something like this: 

window.onDeleteCommand(idsToDelete);

window.onDeleteCommand(true);

I'm using version  11SP11

Ok. My samples will probably not work. They are from Innovator 12 where the buttons are CUI elements.

Maybe parent.onDeleteCommand() or onPurgeDeleteCommand("delete"); ?

Your should be able to use 'onSaveCommand()' without top in front of it. According to Aras users shall leave the "top" away, cause it may cause some trouble. 

Thank you Angela!!