You will need to use the number validation and specify -1 as the minimum and 0 as the max. This way if there is even a single record in the recordset it will trigger this server validation.
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.