The action can often be left blank. It will default to the current page you are browsing. It is the page that the form submits to, so wherever you have code that reacts to the form submission.
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.