You could do this in JavaScript alone, but the user would be presented with their email application and prompted to click the send button, even after all the information has been entered into the email for them.

If you want to bypass the middle application and have a form submit and the mail be delivered directly, then you're looking at a server-side scripting language, such as PHP, Perl, ASP etc. I'd go for PHP!

It requires learning another language, but PHP isn't all too difficult to pickup compared to other languages, especially for a first programming language, and you could learn how to create the email form without copying other people's code the very same day!

On a side note, hit me up if you would like me to do this for you for a small price