It adds a new query string to the url (site.com/page.html#top)
The JS method puts less strain on the server since it doesn't have to 
send a new query to the server to find out where on the page to jump to.

I thought you knew that?

> magick wrote:
> > <script type='text/javascript'>
> > <!--
> > document.write("<p>[&nbsp;<a href='javascript:scroll(0,0);'>Top of 
> > page</a>&nbsp;]</p>")
> > //-->
> > </script>
> > <noscript>
> > <p>[&nbsp;<a href='#top>Top of page</a>&nbsp;]</p>
> > </noscript>
> > 
> > As opposed to just this:
> > 
> > <p>[&nbsp;<a href='javascript:scroll(0,0);'>Top of page</a>&nbsp;]</p>
>
> What's wrong with just using this for everyone, regardless of script 
> support?
>
>    <a href='#top>Top of page</a>
>
> -- 
> Lachlan Hunt