function toggle_expand(name)
{
	expand = document.getElementById(name + '_expand');
	tracks = document.getElementById(name + '_tracks');

	if (expand.innerHTML == '[+]') {
		expand.innerHTML = '[-]';
		tracks.style.display = 'block';
	}
	else {
		expand.innerHTML = '[+]';
		tracks.style.display = 'none';
	}
}