def borderRound(self, val, up = True):
        try:
            val = float(val)
        except:
            return None
        if val==0: return val
        if val>=0:
            sign = 1
        else:
            up = not up
            sign = -1
            val = -val
        if up:
            log = math.ceil(math.log(val, 10))
        else:
            log = math.floor(math.log(val, 10))
        if log>=0:
            lim = 10**max(1,log-2)+0.0
            if lim / 2 > val:
                lim /= 2
            if up:
                val = math.ceil( val / lim ) * lim
            else:
                val = math.floor( val / lim ) * lim
            return sign * val
        else:
            return sign * (up and 1 or 0) #sign * math.ceil( val / 10 ) * 10