Hi,

Although this seems like something very basic, but no matter what I tried I couldn't get my head around it. Basically I want a html form where a user types in their ID number in an input text box and when they hit the submit button it displays their email address which is their company ID number @ company.com, such as below

<form action=""> ID Number: <input
type="text" name="idnumber" /><br/>
<input type="submit" value="Whats my
email address" /> </form> <p>Your
email address is
'idnumber'@email.com</p>

Can this even be done using html or would I need to use Javascript or PHP for it?

Thanks