How to send custom e-mail on delete action in UCM 10g

Hi to all, I’m trying to send a mail when a user deletes a document that is inside of a workflow step in UCM 10g

To do this I have try to methods:

1) the first one I tried  using the actions inside the workflows step, but I found that thy are not trigger by a delete action.

2) the second I'm working is by a custom componet, modifying the javascript allowRevDelete, as show below: 

function mailNotification() {

var link = "mailto:"+"test@private.test.com"

        + "&subject=" + escape("This is my subject")

        + "&body=" + escape("Hola Mundo");

window.location.href = link;

}

function allowRevDelete(frm)