Nice Effect / Widget

I came across this amazing thing I want to do the same on my website. Its from this link , the magics happens when you click on this button, does anyone knows how this can be done,

Solution 1:

It looks like they did it using mootools, but I think it's called a "slide" effect, and almost every javascript framework (prototype using scriptacouls, jQuery, etc.) has support to do that effect, and similar ones.

Solution 2:

you can google for feedback widget and come up with a variety of those .. also not incredibly difficult to build with jQuery's animate() function ..