Description of PopUpMaster :
PopUpMaster is a JavaScript collection that can be used to accomplish a variety of features in your web page. You can create windows with popups and popunders, which can be configured to be displayed once during the browser session or whenever the page is visited. You can make the window to be displayed either with an auto-centering option or full screen. Customizable features include: size, position, resizing, scrollbars, status bar and much more.