Swap Records Present in textbox

Question

Basically I want Swap Records from Textbox to Textbox 

 

Last Textbox  to  first Textbox  and Secondlast Textbox to second Textbox and So on.

 

 

There is no validation to fill the record  in textboxes User can fill record till any no. like 10 ,15,16,23, upto 30.

 

Sorry for the Grammar! 

Please Help!