Creating a row dynamically

 Hi All,
I have a  contacts page where I have a table and 6 textboxes and a button(named ADD) in it. Whenever the user clicks on ADD another row with these textboxes and a button(named ADD) should appear.
Initially I thought of creating a table of 10 rows with these textboxes and button and hide them, and when a user clicks on ADD 1 row will be visible BUT whatif they have to enter 200 rows?
So I want to create the rows with these textboxes and button dynamically without any limit like 200 or 300.
I really need this and any help will be appreciated.
 
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