window.addEvent('domready', function(){

	$$('img.mo').each(function(img) {	
		var src = img.getProperty('src');
		var active = src.substring(src.lastIndexOf('_')+1,src.lastIndexOf('.'));
		var extension = src.substring(src.lastIndexOf('.'),src.length);
		
		img.addEvent('mouseenter', function() { 
			if(active=='active'){
				var name = src.substring(src.lastIndexOf('/')+1,src.lastIndexOf('_'));
				var beforeName = src.substring(0,src.lastIndexOf('/'));
				img.setProperty('src',beforeName +'/'+ name + '_over.gif');
			}else{
				img.setProperty('src',src.replace(extension,'_over' + extension));
			}
		});		
		img.addEvent('mouseleave', function() { 
			img.setProperty('src',src); 
		});
	
	});
});