window.addEvent('domready', function(){
	var nav = $('Nav');
	if(nav) nav.getElements('a').each(function(a){ a.addEvents({
												   'mouseenter': function() { var img = this.getElement('img'); img.src = img.src.replace('.gif', '_o.gif'); },
												   'mouseleave': function() { var img = this.getElement('img'); img.src = img.src.replace('_o.gif', '.gif'); }
												 });
											   });
	// External links in new windows
	$('Content').getElements('a[rel^=External]').each(function(a){ a.target = '_blank'; });
});