function IsIOS() {    if (/(iPhone|iPad|iPod|iOS)/i.test(navigator.userAgent)) {        return true    } else {        return false    }}function IsAndroid() {    if (/(Android|Adr)/i.test(navigator.userAgent)) {        return true    } else {        return false    }}function uuid() {    return "xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx".replace(/[xy]/g, function (a) {        var r = Math.random() * 16 | 0,            t = a == "x" ? r : r & 3 | 8;        return t.toString(16)    })}