Change Tab index on ng-keydown

Question

how can one change tab index on ng-key down 

 

i have a text box in grid in angular on which i am calling a function on ng-keydown.

 

in that function i am validating "Insert Key" and performing some action. 

 

i want to change tab index to next row after execution of that function. or you can say i want to change tab index on insert key after execution of that function.