new Event.observe(window, 'load', function(event){
	
	$$('[rel="popup"]').each(function(element) {
		element.onclick = function() {
			window.open(element.getAttribute('href'), 'popup', 'width=800,height=600,resizable=yes,scrollbars=yes,status=yes');
			return false;
		};
	});
	
	$$('#footer_logo img').each(function(element){
		
		new Event.observe(element, 'mouseover', function(event){
			var logo = Event.element(event);
            var newSrc = logo.src.gsub('szare', 'kolorowe');
            logo.src = newSrc;
		});

		new Event.observe(element, 'mouseout', function(event){
            var logo = Event.element(event);
            var newSrc = logo.src.gsub('kolorowe', 'szare');
            logo.src = newSrc;
        });
	});
});