private CStackFrame is_have(String in_id){
		CStackFrame return_result = null;
		if(local_stack.lastElement().is_have(in_id)){
			return_result = local_stack.lastElement();
		}
		else{
			if(global_area.is_have(in_id)){
				return_result = global_area;
			}
		}
		return return_result;
	}