JS 判断访问终端设备

js判断访问终端设备的类型：

<script type="text/javascript">

var browser={ 
versions:function(){         
var u = navigator.userAgent, app = navigator.appVersion;         
return {             
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/) || !!u.match(/Windows Phone/) || !!u.match(/Android/) || !!u.match(/MQQBrowser/),
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         
};
}()
}
 
document.writeln(" 是否为移动终端: "+browser.versions.mobile);
document.writeln(" ios终端: "+browser.versions.ios);
document.writeln(" android终端: "+browser.versions.android);
document.writeln(" 是否为iPhone: "+browser.versions.iPhone);
document.writeln(" 是否iPad: "+browser.versions.iPad);
document.writeln(navigator.userAgent);

</script>