FLASH
Flash is a programming method that produces streaming animation on websites. It is often used to create interactive and visually appealing sweepstakes. Flash sweepstakes usually look more glitzy, but do not work well with form-filler programs.
SWF FILE
SWF is a partially open file format for multimedia and especially vector graphics developed by Adobe formerly Macromedia. Intended to be small enough for publication on the web, SWF files can contain animations or applets of varying degrees of interactivity and function. SWF is also sometimes used for creating animated display graphics and menus for DVD movies, and television commercials.
FLA FILE