Editing the Digg Script

Hi,

I'm hoping someone can help me with this. I'm trying to integrate the Digg button on my site using this code:

<script type="text/javascript">
digg_url = 'URL';
digg_bgcolor = '#efefef';
digg_skin = 'compact';
</script>
<script src="http://digg.com/tools/diggthis.js" type="text/javascript"></script>

Code (markup):

However I need to automatically create the URL string somehow. I looked up how to use some javascript like this...

<SCRIPT LANGUAGE="JavaScript">
  
           <!--
           {
             document.write(location.href);
           }
           // -->
</SCRIPT>

Code (markup):

But i'm not sure if this is possible to edit into the Digg script and if it's the best way?

I'd appreciate any help.

Thanks.