Sending Double Byte Characters Via Jmail And Javascript

In dreamweaver using javascript I've developed a page that sends the form's contents via Jmail to the user. It works fine until i try to send double byte characters(i.e. japanese). It sends the email but once i open it up in a mail client the text is illegible. My mail server and mail client never has problems sending and recieving double byte characters, the only time this problem pops up is when i send an email from an ASP page via Jmail. I've tried sending the email in plain text and html but it hasn't made any difference. Here is the code I've been using: .....