Marguees are not supported by all browsers. We do not encourage or support the use of frames. They are hard to create and maintain. Some visitors have strong opinions about their difficulty. Bookmarking is very difficult.
Many search engines have difficulty when indexing.
If done poorly, frames can cause problems. There are issues with printing, frame nesting, and opening new windows. If you are going to use tables to simulate frames, be careful defining the full page width. If you define at 800 pixels and the visitor's monitor is set at 600, there is a region of the page that can only be viewed by scrolling right. There is a Webmasters Resource Page that contains information about development tools and assistance with HTML questions.