We recommend using professional hosted form builders such as http://Jotform.com/ and http://wufoo.com/.
Software's like Jotform help you create a fully customised form with
built in compulsory fields, thank you page and captcha's. They work from
any page in your site and provide reporting.
With Wufoo you can create 3 free forms with up to 100 sends/month (branding applied). Then prices start at $14.95/month.
Jotform is free with less than 100 emails/month.
