Change Username login

[rdlook04]

sorry. maybe my english is bad.

i can use the green ones...

Code:

<img src="http://prntscr.com/d09r1n" alt="visual" />

but when the username is numeric

Code:

<img src="http://prntscr.com/d09rzc" alt="" />

it calls a classes function. so i dont know how to use a numeric username. if this function dont let me doit. i try replacing the ID by Username. but the problem there is another one.

PD: for some reason i cant use img on forum ...