//js判断当前移动设备平台

var isiOs = false;

var isAndroid = false;

var isWindowsPhone = false;

if(/(iPhone|iPad|iPod|iOS)/i.test(navigator.userAgent)) {

  isiOS = true;

} else if(/(Android)/i.test(navigator.userAgent)) {

  isAndroid = true;

} else if(/(Windows Phone)/i.test(navigator.userAgent)) {

 isWindowsPhone = true;

}