function getJSengine() { if (!("__proto__" in Object.prototype)) { if (typeof Object.getPrototypeOf === "undefined") return "JScript(IE8-)"; else return "JScript(IE9+)" } var o = JSON.parse('{"__proto__":null}'); if (!(o instanceof Object)) return "V8(GoogleChrome26-)"; if (Object.getPrototypeOf(o) === null) return "JavaScriptCore(Safari)"; if (Object.prototype.hasOwnProperty("__proto__")) { var d