使用JScript查找操作系统名称/版本

function getOS() {
  var userAgent = window.navigator.userAgent;
  var platform = window.navigator.platform;
  var os = null;

  if (/Mac/i.test(platform)) {
    os = 'Mac OS';
  } else if (/Win/i.test(platform)) {
    os = 'Windows';
  } else if (/Linux/i.test(platform)) {
    os = 'Linux';
  } else {
    os = 'Unknown';
  }

  return os;
}

function getOSVersion() {
  var userAgent = window.navigator.userAgent;
  var platform = window.navigator.platform;
  var osVersion = null;

  if (/Mac/i.test(platform)) {
    osVersion = userAgent.match(/Mac OS X (\d+(?:\.\d+)+)/i)[1];
  } else if (/Win/i.test(platform)) {
    osVersion = userAgent.match(/Windows NT (\d+\.\d+)/i)[1];
  } else if (/Linux/i.test(platform)) {
    osVersion = userAgent.match(/Linux (\d+\.\d+\.\d+)/i)[1];
  } else {
    osVersion = 'Unknown';
  }

  return osVersion;
}

console.log('操作系统名称：' + getOS());
console.log('操作系统版本：' + getOSVersion());