window.addEvent('domready', function(){

	// hide all inactive rows
	$$('tr.hide').setStyle('display','none');

	// add click handler
	$$('.folder').addEvent('click',function() {
		// identify which rows to show
		var rel = this.get('rel');
		// show rows
		$$('tr.'+rel).setStyle('display','');

		// loop through child table rows
		$$('tr.'+rel).each(function(el) {
			// only hide rows which have no 'hide' class
			if( !el.hasClass('hide') ) {
				el.setStyle('display', 'none');

				// hide all sub folder files
				var links = el.getElements('a');
				links.each(function(l) {
					if( l.rel ) {
						$$('tr.'+l.rel).setStyle('display','none');
						$$('tr.'+l.rel).toggleClass('hide');
					}
				});
			}

			// toggle hide class
			el.toggleClass('hide');
		});
	return false;
	});
});