Call the method like so: onkeypress="return inputLimiter(event, 'Numbers', this.value, 5);"

Javascript function to round decimal values

function roundNumber(number, decimal_points) {
    if (!decimal_points) return Math.round(number);
    if (number === 0) {
        var decimals = "";
        for (var i = 0; i < decimal_points; i++) decimals += "0";
        return "0." + decimals;
    }

    var exponent = Math.pow(10, decimal_points);
    var num = Math.round((number * exponent)).toString();
    return num.slice(0, -1 * decimal_points) + "." + num.slice(-1 * decimal_points);
}