// rollover.js

window.addEvent('domready', function(){
	$$('#nav a img').each(function(el){
		new Image().src = el.src.replace('.gif', '-active.gif');							  
		el.addEvent( 'mouseover', function(){ this.src = this.src.replace('.gif', '-active.gif'); });
		el.addEvent( 'mouseout', function(){ this.src = this.src.replace('-active', ''); });
	});
});