window.addEvent('domready', function(){
	document.getElements('img').each(function(img){
		if (!img.getParent().getParent().hasClass('selected')) {
			img.addEvent('mouseenter', function(){
				this.setProperty('src', this.getProperty('src').replace('_off.gif', '_on.gif'));
			}).addEvent('mouseleave', function(){
				this.setProperty('src', this.getProperty('src').replace('_on.gif', '_off.gif'));
			});
		}
	});
});