|Tables are widely used as a means to contain images and text on border backgrounds. If tables are not used, text or images may "bleed" over into the border giving an undesired result.|
If we use this page as an example, there are already three tables, four width adjustments and six alignment attributes used.
If you wonder why the alignment attributes outnumber all the others, it's because it is sometimes neccessary to align a table in one direction and then the text within it in the other direction.
If that just made your head spin , don't worry. with a little practice and experience, you will be using border backgrounds to add interest to your pages !