IxEdit

IxEdit is a JavaScript-based interaction design tool for the web. With IxEdit, designers can practice DOM-scripting without coding to change, add, move, or transform elements dynamically on your web pages. Especially, IxEdit must be useful to try various interactions rapidly in the prototyping phase of your web application.
Interactions are visual changes of the screen which occur when users act on user interface elements. In other words, interactions are the behaviors of the user interface. For instance, when a user click a button, an image switches to another, or when a user drags an edge, the viewport expands. Those are interactions. Users are doing their jobs with a computer through various interactions generally.
To implement interactions on a web page, programming with JavaScript is needed. However, it is hard to manage JavaScript for many designers. Therefore, making well-designed web interactions is difficult in general. IxEdit solves this problem. If you have basic knowledge about HTML and CSS, you can create interactions as you like. JavaScript coding is no longer needed.

http://www.ixedit.com