ThickBox is a webpage UI dialog widget written in JavaScript on top of the jQuery library. Its function is to show a single image, multiple images, inline content, iframed content, or content served through AJAX in a hybrid modal. A modal window is a child window which requires the user to interact with it before they can return to operating the parent application. Modal windows are commonly used in GUI systems to absorb user awareness and to display emergency states.

Requirements: Internet Explorer 6.0+, Firefox 1.5+, Opera 9.0+, Safari 2.0+
Demo: http://jquery.com/demo/thickbox/#examples
License: MIT, GNU License