var btn_mus = document.getElementById('btn_music_search')
var btn_cat = document.getElementById('btn_catalogue')
var btn_gen = document.getElementById('btn_genres')

var music_search = new Fx.Slide('music_search', {duration: 300})
var catalogue = new Fx.Slide('catalogue', {duration: 300})
var genres = new Fx.Slide('genres', {duration: 300})
var genre_list = new Fx.Slide('genre_list', {duration: 300})

	catalogue.hide()
	genres.hide()

function showBlock(toshow, btn) {

	if (btn_mus.className == 'active') {toh = 'music_search'}
	if (btn_gen.className == 'active') {toh = 'genres'}
	if (btn_cat.className == 'active') {toh = 'catalogue'}
	
	catalogue.hide()
	genres.hide()
	music_search.hide()
	
	document.getElementById('btn_' + toh).className = ''
	toshow.toggle()
	btn.className = 'active'
}