function menu_click(elm)
{
	$('#category_'+elm).slideToggle("slow");
	
	src = $('#plus_'+elm).attr('src');
	if(src == '/img/design/min.gif')
	{
		$('#plus_'+elm).attr("src", "/img/design/plus.gif");
	}
	else
	{
		$('#plus_'+elm).attr("src", "/img/design/min.gif");
	}
}