function categoryNavInit()
{
	stateName = "collapsed";

	$('categoryNav').select('li').each(function(catSet)
	{
		catSetName = catSet.select('strong')[0];
		
		if(catSetName)
		{
			Event.observe(catSetName, 'click', function()
			{
				if (catSet.hasClassName(stateName)) {
					catSet.removeClassName(stateName);
				}
				
				else {
					catSet.addClassName(stateName)
				}
			});
		}
	});
}

Event.observe(window, 'load', function() { categoryNavInit(); });