[quickthrower2]

What is the main advantage of that for a user? Compared to say a css class or node id?

You still need a script tag either way it seems.

[somery]

When comparing to Iframe our JS-based solution better adopts to the existing page layout due to the fact that it embeds into the existing page DOM (when iframe lives in it's own DOM which brings many limitations). Also it loads much faster than any equivalent iframe solution