- var ua = navigator.userAgent.toLowerCase(),
- check = function(r){
- return r.test(ua);
- },
- isOpera = check(/opera/),
- isChrome = check(/chrome/),
- iswebKit = check(/webkit/),
- isSafari = !isChrome && check(/safari/),
- isSafari3 = isSafari && check(/version\\/3/),
- isSafari4 = isSafari && check(/version\\/4/),
- isIE = !isOpera && check(/msie/),
- isIE7 = isIE && check(/msie 7/),
- isIE8 = isIE && check(/msie 8/),
- isIE6 = isIE && !isIE7 && !isIE8,
- isGecko = !isWebKit && check(/gecko/),
- isGecko3 = isGecko && check(/rv:1\\.9/),
- isBorderBox = isIE && !isStrict,
- isWindows = check(/windows|win32/),
- isMac = check(/macintosh|mac os x/),
- isAir = check(/adobeair/),
- isLinux = check(/linux/);
- //该片段来自于http://www.codesnippet.cn/detail/291020136771.html
来源: http://www.codesnippet.cn/detail/291020136771.html