function swap_year(x,yr)
{
	if(typeof yr == 'undefined')
		yr = x.innerHTML;

	var yrs = x.up('.content').down('.news_years').childElements();
	if(x.tagName != 'A')
		x = yrs[0].down('a');

	x.style.color = '#000000';

	yrs.each(function(item){
		var link = item.down('a');
		if(link != x)
			link.style.color = '';
	});

	x.up('.content').down('.news_content').childElements().each(function(item){
		if(item.hasClassName('year'+yr))
			item.show();
		else
			item.hide();
	});
}