number.js
function randomBetween() {
    var min = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 0;
    var max = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 10;

    if (!isNumber(min) || isNumericalNaN(min)) {
        throw new TypeError('Min should be numeric');
    }

    if (!isNumber(max) || isNumericalNaN(max)) {
        throw new TypeError('Max should be numeric');
    }

    return Math.random() * max + min;
}
function randomBetween() {
    var min = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 0;
    var max = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 10;

    if (!isNumber(min) || isNumericalNaN(min)) {
        throw new TypeError('Min should be numeric');
    }

    if (!isNumber(max) || isNumericalNaN(max)) {
        throw new TypeError('Max should be numeric');
    }

    return Math.random() * max + min;
}
Generate random between min and max