function sub_menu(id,num,idn){
	if ( num == 1 ){
		id.className = 'mtOver';
		obj = FIND("pic"+idn);
		if ( obj != null )
			obj.src='/i/sqB.gif';
	}
	else{
		id.className = 'mt';
		obj = FIND("pic"+idn);
		if ( obj != null )
			obj.src='/i/sqW.gif';
	}
}