Unsorted JavaScript stuff

unsorted.js

/**
 * Unsorted stuff
 * Copyright (c) 2011, marlun78
 * MIT License, https://gist.github.com/marlun78/bd0800cf5e8053ba9f83
 */
(function (NS) {

    if (!NS) { NS = window; }

    // isNumber
    NS.isNumber = function (n) {
        return !isNaN(parseFloat(n)) && isFinite(n);
    };

    // toNumber
    // Dependent on NS.isNumber
    NS.toNumber = function (n) {
        return NS.isNumber(n) ? Number(n) : NaN;
    };

    // random
    NS.random = function (from, to) {
        return Math.round(Math.random() * (to - from)) + from;
    };

    // isLeapYear
    NS.isLeapYear = function (year) {
        return ((year % 4 === 0) && (year % 100 !== 0)) || (year % 400 === 0);
    };

    // getRandomRGB
    // Dependent on NS.random
    NS.getRandomRGB = function (asStyle) {
        var count = i = 2, rgb = [];
        do {
            rgb[count - i] = NS.random(0, 255);
        } while (i -= 1)
        return asStyle ? 'rgb(' + rgb.join(',') + ')' : rgb;
    };

    // getRandomRGBA
    // Dependent on NS.getRandomRGB
    NS.getRandomRGBA = function (asStyle) {
        var rgba = NS.getRandomRGB();
        rgba[rgba.length] = Math.random(); 
        return asStyle ? 'rgba(' + rgba.join(',') + ')' : rgba;
    };

}(/* Pass in your namespace here ... */));