function toggleList() {
	button = $('#category_genre_btn');
	if (button.attr('src') == '/programmation/images/programmation_topExpand.jpg') {
		newSrc = button.attr('src').replace('Expand', 'Collapse');
	} else {
		newSrc = button.attr('src').replace('Collapse', 'Expand');
	}
	
	// preform animation
	button.attr("src", newSrc);
	$('#cat_genre_list').slideToggle(300);
	
	return false;
}