function isRange(object, params)
{
    if(params['allow_empty'] && params['allow_empty'] == 'true' && object.value == '')
    {
        return true;
    }

    // convert to numbers
    var val = object.value - 0;
    var low = params['low'] - 0;
    var high = params['high'] - 0;

    return (val >= low && val <= high);
}