Generating email hyperlink in field

In my form, I have a field set up for the user to enter their email address. Once they exit out, that field should then create a hyperlink for that email. Because many different people will fill out this form, my script needs to recognize any and all addresses that are typed into the email field.

I currently have:

xfa.host.gotoURL ("mailto:info [at] xyz [dot] com")

Obviously the "mailto" address needs to recognize whatever is entered.

Any suggestions?