in your style.css you have the following:
* { border:0; margin:0 auto; padding:0; outline:none; }
this is removing the border from everything.
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.