css box

how can we create css form like this : iranhost.com
all of parts and icon are in many boxes .

If you mean the domain checker box, then on this particular page it looks like it's all done in javascript.

That said, I would have thought you could create a similar form in html - you'd have a text input for the main part of the domain, a select for the .com/.co.uk/.tv etc, and then an image for the submit button. Use a bit of css to align them all up together, then post the form to a script that concatenates the text and the select together to check the resultant domain.