document.observe ('dom:loaded', function () {
try {
	//Get all links
	$$('a').each(function (element)	{
			//Check to see that href begins with http			   
			var url_sub = /^http/;
			$(element).readAttribute('href').gsub(url_sub, function (match) {
				//set rel to external for semantics
				$(element).setAttribute('rel', 'external');
				//check to see that link has no children eg. img
				if ($(element).down() == null) {
					//set class external for styling
					$(element).addClassName('external');
				}
			});
	});	
} catch (err) {}	
});