function round_decimals(original_number, decimals){
    var result1=original_number * Math.pow(10,decimals);
    var result2=Math.round(result1);
    var result3=result2/Math.pow(10,decimals);
    return pad_with_zeros(result3,decimals);
}

function pad_with_zeros(rounded_value,decimal_places){
    var value_string=rounded_value.toString();
    var decimal_location=value_string.indexOf(".");
    if(decimal_location==-1) {
        decimal_part_length = 0;
        value_string += decimal_places > 0 ? "." : "";
    }else{
        decimal_part_length = value_string.length - decimal_location - 1;
    }
    var pad_total = decimal_places - decimal_part_length;
    if(pad_total > 0){
        for (var counter = 1; counter <= pad_total; counter++)
            value_string += "0";
    };
    return value_string;
}