If you aren't a programmer I would copy and paste the entire javascript page and edit the address and API key from there. You won't be able to understand and add individual pieces if you don't understand script in general.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.