[Opensource] Finding button identities within the Transition run() method

[Jim.Clarke at arcadiagroup.co.uk]

I have a web page which contains a table of text strings going down the
page. Along side each text string is an image button. I am using the same
image button for each line. So the page looks like this:

t  e  x  t   s  t  r  i  n  g          button
t  e  x  t   s  t  r  i  n  g          button
t  e  x  t   s  t  r  i  n  g          button
t  e  x  t   s  t  r  i  n  g          button
.
.
.
.

To construct this page I am using a Block object containing set of other
Block objects each of which contains an Output object for the text string
and a Transition object for the button. The actual Transition named within
each Transition object is the same.

So my problem is:  As all of the buttons will call the same Transition run
() method how, in the run() method, can I tell which button has been
pressed?

Many thanks

Jim Clarke