Event.observe(window, 'load', function() {
	$$('a[href!=""]').each(function(link){
  	var siteregex = /^(https?:\/\/)([a-z]*\.)?(gtalumni.org)/i;
    if((link.readAttribute('href').startsWith('http://') ||
 				link.readAttribute('href').startsWith('https://')) &&
			 !link.readAttribute('href').match(siteregex)) {
			link.writeAttribute('target','_blank');
			link.writeAttribute('rel','external');
		}
	});

	$$('a[rel="external"]').each(function(link) {
		if(link.readAttribute('href') != '' && link.readAttribute('href') != '#'){
			link.writeAttribute('target','_blank');
		}
	});
});