I want text box to be cleared on click just once...

[spyk3]

psuedocode:

if textbox color = gray then
clear textbox
textbox color = black
end if

And What about when there is text in the box? then it will still dim*? is this what you want?
a username should never be username, it's just really bad db'ing

*The text in the box will still go gray, reguardless of what's in it.
-The code I gave you is more like a normal username interface, whereby if text is typed in box, then it will stay until it is backspaced or deleted out, in which case, when the box loses focus, it will return to a dim gray word of "username"
-Also with that pseudo code, the word "username" can't be replaced in the textbox