Sélection d'une ligne dans un widget "Table"

hi , i have a table of 10 rows *10 columns populated from a database i want to select a row from a table and get the data from this row . i have looked into this http://community.bonitasoft.com/groups/french-corner/resolved-s%C3%A9lec...

they said that i can use a javascript code, can someone be more explicit ? thank you