Sindbad~EG File Manager

// Number.isFinite polyfill
// http://people.mozilla.org/~jorendorff/es6-draft.html#sec-number.isfinite
if (typeof Number.isFinite !== "function") {
    Number.isFinite = function isFinite(value) {
        // 1. If Type(number) is not Number, return false.
        if (typeof value !== "number") {
            return false;
        }
        // 2. If number is NaN, +∞, or −∞, return false.
        if (value !== value || value === Infinity || value === -Infinity) {
            return false;
        }
        // 3. Otherwise, return true.
        return true;
    };
}