When it comes to Web applications, one of the biggest changes in user interface design over the past few years has been the growing use of LightBox dialogs.  Though they’re similar to a popup window, the LightBox doesn’t involve a new window at all.  Indeed, the LightBox is simply a dynamically created <div> that displays a new modal window with a semitransparent cover.  This cover blocks user interactions with other page elements while the LightBox is open....Click here to read more.