fluid text input with floated and variable right button

[counter10]

I have a problem similar to this: http://stackoverflow.com/questions/10126031/css-fluid-text-input-with-floated-right-buttonHowever, in my case, different buttons have different text, so I can't use fixed width. Also, the text in the button changes as well (on submit). Specs:A text field and a button on one line. The button should \[code\]float: right\[/code\] and the text field should always be \[code\]container - button.width - paddings - margins\[/code\]. How can I accomplish this without Javascript?