am2-enh.const.js

const LBS_2_KG = 2.5;
const REALISM_MAX_FUEL_CAPACITY_LBS = 200000000;
const BLINK_TEXT_DUR_TOT = 1500;
const BLINK_TEXT_DUR_IN = 500;
const BLINK_TEXT_DUR_OUT = 500;
const SEAT_PRICE_MAX_PROFIT_FACTOR = 1.749;
const SEAT_PRICE_MAX_ECONOMY = 20000;
const SEAT_PRICE_MAX_BUSINESS = 25000;
const SEAT_PRICE_MAX_FIRST = 45000;
const FUEL_PRICE_HOTDEAL = 250;
const FUEL_PRICE_GOOD = 350;
const FUEL_PRICE_AVERAGE = 800;
const FUEL_LEVEL_PCT_DANGER = 20;
const FUEL_LEVEL_PCT_WARNING = 20;

am2-enh.dict.js

var AM2Enh = AM2Enh || {};
AM2Enh.dict = {};
AM2Enh.dict["Fuel cost"] = ["Fuel cost","Brændstof pris","Treibstoffkosten"];
AM2Enh.dict["Active routes"] = [ "Active routes","Aktive ruter","Aktive Routen" ];

am2-enh.util.js

/* extend JavaScript's Math.round function by (optional) precision argument */
Math.oldRound = Math.round;
Math.round = function(number, precision) {
    var retVal;

    if (precision !== undefined && precision > 0) {
        var factor = Math.pow(10, precision);
        var tempNumber = number * factor;
        var roundedTempNumber = Math.oldRound(tempNumber);
        retVal = roundedTempNumber / factor;
    } else {
        retVal = Math.oldRound(number);
    }
    return retVal;
};

/* extend JavaScript's Math.floor function by (optional) precision argument */
Math.oldFloor = Math.floor;
Math.floor = function(number, precision) {
    var retVal;

    if (precision !== undefined && precision > 0) {
        var factor = Math.pow(10, precision);
        var tempNumber = number * factor;
        var roundedTempNumber = Math.oldFloor(tempNumber);
        retVal = roundedTempNumber / factor;
    } else {
        retVal = Math.oldFloor(number);
    }
    return retVal;
};

/*  Checks if a string ends with the specified string... */
if (typeof String.prototype.endsWith != 'function') {
    String.prototype.endsWith = function (needle) {
        return this.slice(-needle.length) == needle;
    };
}

/* search in an HTML-SELECT Option Array (containing OPTION-Elements) for specified 'needle' 
   on success return value is index value of found OPTION Element */ 
function matchPreselection(optionsArray, needle) {
    var selection = 1; // default value

    if (optionsArray.length > 0 && needle !== undefined) {
        for (var option of optionsArray) {
            if (option.value == needle) {
                selection = option.index;
                break;
            }
        }
    } else { 
        selection = 0; // error value
    }
    return selection;
}