348919 Easy contactform

I want a script which makes an contactform. Easy, hundreds out there. But I want one which works on the backend and want to make a form from scratch with all the function I need for one form. So I must be able to make a simple form, but also one with dropdowns, radio, requiered or not etc etc. Also a captcha would be welcome to add. When all is sorted out (also width etc), it must create a code which than can be put on a website. So it is one script, but must be able to make as many as I want.