D.J. Central

If you look at the banner of this site, you'll see a yellow like that looks like the visual representation of a sound loop. If you resize your window, you'll see that this line expands or shrinks as neccesary. I've tried looking at the source of the page, however I know next to knowthing...alright, absolutely nothing...about JavaScript.

Does anyone know how the designer made the line span as the browser was being resized?

Any insight would be appreciated.

Thanks!
Abs