var ToggleExpandableDiv = function(oEl){
	var i_id = oEl.id.replace(/^cat-header-([\d]+)$/, '$1');

	if (oEl.hasClass('open')){
		// close it!
		$('cat-body-' + i_id).addClass('hidden');
		oEl.removeClass('open');
	} else {
		$('cat-body-' + i_id).removeClass('hidden');
		oEl.addClass('open');
	}
};


window.addEvent('domready', function(){
	
	$$('div.expand-header').each(function(oEl){
		oEl.addEvent('click', function(oEvent){
			ToggleExpandableDiv(oEl);
		});
	});
	
});