This is a code fo adding your site to many social bookmark sites as Digg.com, Facebook, Del.icio.us etc

<script type="text/javascript">
addthis_pub             = 'mypub';
addthis_logo            = 'http://www.addthis.com/images/yourlogo.png';
addthis_logo_background = 'EFEFFF';
addthis_logo_color      = '666699';
addthis_brand           = 'Your Site';
addthis_options         = 'favorites, email, digg, delicious, google,
facebook, live, more';

<a onmouseover="return addthis_open(this, '', 'http://mysite.com/',
'All Best Cars')"
onmouseout="addthis_close()" href="http://www.addthis.com/bookmark.php"
onclick="return addthis_sendto()"><img border="0" width="125"
alt="" src="http://s9.addthis.com/button1-share.gif" height="16"/></a>