function CAT_showSubs( level_el , cat_id ) {
	var tmp_div = getElement( "c" + cat_id );
	if( tmp_div ) {
		
		tmp_div.style.display = tmp_div.style.display == "none" ? "block" : "none";
		if( level_el ) level_el.className = tmp_div.style.display == "none" ? "CAT_level_closed" : "CAT_level_open";
		}
	}