Skip a control upon tab press & return back to the same control

Skip a control upon tab press & return back to the same control

I am building a user interface through jquery & asp.net like this. I am explaining how my screen looks like..

Imagine that I have three textboxes (txt1.text , txt2.text, txt3.text) and a button (btnaddrow) in one row and textboxes (txt4,5) in second row in .aspx page.
 When I click "Addrow" button it creates the whole set again (same fashion as in 1st step) I am handling the onlick event of btnaddrow through Jquery and dynamically
building this UI.



I want to accomplish this ..

when I hit tab it should navigate through txt 1,2,3,4,5 and btnaddrow but now if i hit tab it will navigate through txt1,2,3, brnaddrow , 5 ,6. 
How do I skip the btnaddrow and go to 5,6 txtboxes and come back and focus on btnaddrow. If I set the tabindex for these controls it won't work after adding a new row.

Any idea would be appreciated..