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                presto: u.indexOf('Presto') > -, //opera内核

                webKit: u.indexOf('AppleWebKit') > -, //苹果、谷歌内核

                gecko: u.indexOf('Gecko') > - && u.indexOf('KHTML') == -,//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') > - || u.indexOf('Adr') > -, //android终端

                iPhone: u.indexOf('iPhone') > -, //是否为iPhone或者QQHD浏览器

                iPad: u.indexOf('iPad') > -, //是否iPad

                webApp: u.indexOf('Safari') == -, //是否web应该程序，没有头部与底部

                weixin: u.indexOf('MicroMessenger') > -, //是否微信 （2015-01-22新增）

                qq: u.match(/\sQQ/i) == " qq" //是否QQ

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