<?php
$img_src = 'http://mysite.com/images/world.gif';
if(defined('COUNTRY_NAME_BY_IP')) {
	if(COUNTRY_NAME_BY_IP == 'france') {
		$img_src = 'http://mysite.com/images/france.gif';
	}
}
?>

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>