There are two sides to form processing: the client-side and the server-side.The client-side is the actual form that a visitor sees on your Web page. The form accepts the information entered by the user and the browser sends the data to the server for processing.The server-side is a little more complicated, mainly because you have so many options for form processing. When the browser sends the form data to the server, it (the browser) assumes the server knows what to do with it. The server relies on you, the webmaster, to provide those instructions.If you don't, the user may see an error message. Even worse, the form may seem to submit without a problem, but nothing really happens on the server-side. Keep this from happening by becoming familiar with the attributes that go with the FORM tag, what they mean, and what they do.