Some call it magic -- the ability to make objects appear suddenly out of nowhere. You can create this kind of magic on your website using a few lines of JavaScript ...

Thankfully, using JavaScript to create this effect isn’t that difficult ... To start, you’ll need two identically sized, nontransparent buttons. (In this example, I’ve called them ...

Facebook allows you to create different kinds of buttons, or badges ... Facebook provides a user interface for generating the javascript for displaying the badge on your site.