window.addEvent('domready', function(){
	// artist drop down
	if($('select_artist')){
		$('select_artist').addEvent('change', function(){
			window.location = '?artist='+this.value;
		});
	}
	// disc dropdown
	if($('select_disc')){
		$('select_disc').addEvent('change', function(){
			window.location = '?disc='+this.value;
		});
	}
});