MDI Window allow you to create moveable/resizable child windows in your web browser. You can choose between full screen or custom size. It come with the look and feel of Windows XP and is easily customisable via the .css file. All javascript, xml, xsl, css base (no plug-in). Data management friendly i.e. event trigger when 'X' icon is click, window can be always on top until event append, access to window properties like oWindow.save, oWindow.content, etc. You are not required to open other browser tab or suffer the loss of current user credentials and session. This end result is a real MDI.