need help!

hi to all! i want to do followings using php: 1) i have made a form in html. this form contain user details who want to download a pdf file. where javascript is handling data validation on submission of that user info. 2) after that a php file will open and it takes all user's information and send a mail to me along with those data and automaically start download that pdf file. user won't get any mail. 3) i want to put basic checking of email address also so that it will force someone to put correct email address. can any one help me out! let me know, then i will submit that php coding also. thanks in advance, Sujata Ghosh. Calcutta, india.