js判断手机端(Android手机还是iPhone手机)

<script type="text/javascript">
var browser = {
  versions: function () {
  var u = navigator.userAgent, app = navigator.appVersion;
  return {//移动终端浏览器版本信息
   trident: u.indexOf(\'Trident\') > -1, //IE内核
   presto: u.indexOf(\'Presto\') > -1, //opera内核
   webKit: u.indexOf(\'AppleWebKit\') > -1, //苹果、谷歌内核
   gecko: u.indexOf(\'Gecko\') > -1 && u.indexOf(\'KHTML\') == -1, //火狐内核
   mobile: !!u.match(/AppleWebKit.*Mobile/i) || !!u.match(/MIDP|SymbianOS|NOKIA|SAMSUNG|LG|NEC|TCL|Alcatel|BIRD|DBTEL|Dopod|PHILIPS|HAIER|LENOVO|MOT-|Nokia|SonyEricsson|SIE-|Amoi|ZTE/), //是否为移动终端
   ios: !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/), //ios终端
   android: u.indexOf(\'Android\') > -1 || u.indexOf(\'Linux\') > -1, //android终端或者uc浏览器
   iPhone: u.indexOf(\'iPhone\') > -1 || u.indexOf(\'Mac\') > -1, //是否为iPhone或者QQHD浏览器
   iPad: u.indexOf(\'iPad\') > -1, //是否iPad
   webApp: u.indexOf(\'Safari\') == -1 //是否web应该程序，没有头部与底部
  };
  } (),
  language: (navigator.browserLanguage || navigator.language).toLowerCase()
}
if (browser.versions.iPhone || browser.versions.iPad || browser.versions.ios) {
window.location.href = "//www.jb51.net";
}
if (browser.versions.android) {
window.location.href = "http://www.qq.com";
}
</script>