document.observe('dom:loaded', function() {
	
	var r = 200;
	var g = 30;
	var b = 70;
	$('left_menu').down().childElements().each(function(x){ 
	
		x.setStyle ({
			backgroundColor: 'RGB(' + r + ',' + g + ',' + b + ')'
		});
		
		if (x.down().tagName === 'SPAN') {
			x.setStyle ({
				backgroundColor: 'RGB(255,255,255)'
			});
			x.down().setStyle ({
				color: 'RGB(' + r + ',' + g + ',' + b + ')'
			});
		}
		
		r -= 40;
		b += 10;
		
		if (r < 0) r = 0;		
		
	});
	
	var r = 200;
	var g = 30;
	var b = 70;

	$('cats').childElements().each(function(x){ 
		x.setStyle ({
			backgroundColor: 'RGB(' + r + ',' + g + ',' + b + ')'
		});
		r -= 50;
		b += 10;
		
		if (r < 0) r = 0;
		
	});
});