h5判断打开页面环境

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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.*/),             /*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,             /*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*/             souyue: u.indexOf('souyue') > -1,             superapp: u.indexOf('superapp') > -1,             weixin: u.toLowerCase().indexOf('micromessenger') > -1,             Safari: u.indexOf('Safari') > -1,             weiBo: u.toLocaleLowerCase().match(/WeiBo/i) == "weibo",         };     }(),     language: (navigator.browserLanguage || navigator.language).toLowerCase() };

　　判断设备类型

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if(browser.versions.android) {   //操作语句 }