no., it wont replace the tooltip, but will allow you to customize the llok of the field on error.
it's not posible to remove the tooltip.
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.