window.addEvent('domready', function() {
	$$('#work .block .image_container a').each(function(link) {
		link.set('tween', {duration: 300});
		link.setStyle('background-position', '0px 0px');
		link.addEvent('mouseover', function() { 
			this.tween('background-position', '0px -100px');
		});
		link.addEvent('mouseout', function() {
			this.tween('background-position', '0px 0px');
		});
	});
	
	$$('.mod_sitemap a').each(function(link) {
		link.set('tween', {duration: 250});
		link.setStyle('background-position', '-20px 5px');
		link.addEvent('mouseover', function() {
			link.tween('background-position', '5px 5px');
		});
		link.addEvent('mouseout', function() {
			link.tween('background-position', '-20px 5px');
		});
	}); 
});