How to append new rows in a table with Javascript ?

Hi ,
I'd like to append new rows in a table dynamically using javascript?
Do some of you have already done this before ?

Rui's answer will create copies of the entire table.  There may be times where thsi is what you want, but you asked about creating new rows.  If your new row is a copy of one of your existing rows, then you could use
_RowName.addInstance(1);
(the underscore at the beginning invokes the instance manager).  Is this what you're looking for?

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