JS reserved 2-bit decimal rounding (less than 2 digits after the decimal point, self-use 0-padded)

function Changetwodecimal_f (x) {
    var f_x = parsefloat (x);
    if (IsNaN (f_x)) {
        Alert (' Function:changetwodecimal->parameter error ');
        return false;
    }
    var f_x = math.round (x * 100)/100;
    var s_x = f_x.tostring ();
    var pos_decimal = S_x.indexof ('. ');
    if (Pos_decimal < 0) {
        Pos_decimal = S_x.length;
        S_x + = '. ';
    }
    while (s_x.length <= Pos_decimal + 2) {
        s_x + = ' 0 ';
    }
    return s_x;
}

Reference Link: http://www.jb51.net/article/45884.htm

JS reserved 2-bit decimal rounding (less than 2 digits after the decimal point, self-use 0-padded)