Javascript for Sending an E-mail

Hello,

I am wondering if someone could help me with the following question regarding sending an e-mail using Javascript. I would like to set up a trigger for a button that automatically sends an e-mail when the user clicks on it. It would open their mail client, then include a predefined e-mail address to send to, subject, and content (no variables required). The trigger would also automatically send the e-mail.

Is this possible to do? If so, I would appreciate it if someone could send me the Javascript code for this to try out.

Thanks,

Brian