javascript判断当前的浏览器和操作系统的版本

langhua9527 · 发表于 2013-2-7 03:40:38

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <title>useragent.html</title> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="this is my page"> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <script type="text/javascript"> //获是userAgent信息，里面表示浏览器的相关信息 //navigator.appVersion获得版本号的信息 var sUserAgent = navigator.userAgent;//为MinMoz准备的,比较版本号,因为它的版本号有与从不同function compareVersions(sVersion1, sVersion2) { var aVersion1 = sVersion1.split("."); var aVersion2 = sVersion2.split("."); if (aVersion1.length > aVersion2.length) { for (var i=0; i < aVersion1.length - aVersion2.length; i++) { //差的位数就放入0 aVersion2.push("0"); } } else if (aVersion1.length < aVersion2.length) { for (var i=0; i < aVersion2.length - aVersion1.length; i++) { aVersion1.push("0"); } } for (var i=0; i < aVersion1.length; i++) { //比如版本号的大小 if (aVersion1[i] < aVersion2[i]) { return -1; } else if (aVersion1[i] > aVersion2[i]) { return 1; } } return 0;}//查看是不是IE的浏览器,同时要满足以下两个要求,但没有考虑到Opera var isIE = sUserAgent.indexOf("compatible") > -1 && sUserAgent.indexOf("MSIE") > -1; //下面就判断是那个版本的IE,还没有加入IE7和IE8我这没有,不知道版本号....那位能帮我加一下 var isMinIE4 = isMinIE5 = isMinIE5_5 = isMinIE6 = false;if (isIE) { var reIE = new RegExp("MSIE (\\d+\\.\\d+);");//用正则表示式去获得版本号 reIE.test(sUserAgent); var fIEVersion = parseFloat(RegExp["$1"]); isMinIE4 = fIEVersion >= 4;//true or false isMinIE5 = fIEVersion >= 5; isMinIE5_5 = fIEVersion >= 5.5; isMinIE6 = fIEVersion >= 6.0;}//查看是不是MinMoz的浏览器 var isMoz = sUserAgent.indexOf("Gecko") > -1;//下面就判断是那个版本的FFvar isMinMoz1 = sMinMoz1_4 = isMinMoz1_5 = false;if (isMoz) { var reMoz = new RegExp("rv:(\\d+\\.\\d+(?:\\.\\d+)?)"); reMoz.test(sUserAgent); isMinMoz1 = compareVersions(RegExp["$1"], "1.0") >= 0; isMinMoz1_4 = compareVersions(RegExp["$1"], "1.4") >= 0; isMinMoz1_5 = compareVersions(RegExp["$1"], "1.5") >= 0;} //查看操作系统 var isWin = (navigator.platform == "Win32") || (navigator.platform == "Windows");var isMac = (navigator.platform == "Mac68K") || (navigator.platform == "MacPPC") || (navigator.platform == "Macintosh");var isUnix = (navigator.platform == "X11") && !isWin && !isMac;//先全部设为falsevar isWin95 = isWin98 = isWinNT4 = isWin2K = isWinME = isWinXP = false;var isMac68K = isMacPPC = false;var isSunOS = isMinSunOS4 = isMinSunOS5 = isMinSunOS5_5 = false;if (isWin) { isWin95 = sUserAgent.indexOf("Win95") > -1 || sUserAgent.indexOf("Windows 95") > -1; isWin98 = sUserAgent.indexOf("Win98") > -1 || sUserAgent.indexOf("Windows 98") > -1; isWinME = sUserAgent.indexOf("Win 9x 4.90") > -1 || sUserAgent.indexOf("Windows ME") > -1; isWin2K = sUserAgent.indexOf("Windows NT 5.0") > -1 || sUserAgent.indexOf("Windows 2000") > -1; isWinXP = sUserAgent.indexOf("Windows NT 5.1") > -1 || sUserAgent.indexOf("Windows XP") > -1; isWinNT4 = sUserAgent.indexOf("WinNT") > -1 || sUserAgent.indexOf("Windows NT") > -1 || sUserAgent.indexOf("WinNT4.0") > -1 || sUserAgent.indexOf("Windows NT 4.0") > -1 && (!isWinME && !isWin2K && !isWinXP);} //没玩过苹果机....if (isMac) { isMac68K = sUserAgent.indexOf("Mac_68000") > -1 || sUserAgent.indexOf("68K") > -1; isMacPPC = sUserAgent.indexOf("Mac_PowerPC") > -1 || sUserAgent.indexOf("PPC") > -1; }if (isUnix) { isSunOS = sUserAgent.indexOf("SunOS") > -1; if (isSunOS) { var reSunOS = new RegExp("SunOS (\\d+\\.\\d+(?:\\.\\d+)?)"); reSunOS.test(sUserAgent); isMinSunOS4 = compareVersions(RegExp["$1"], "4.0") >= 0; isMinSunOS5 = compareVersions(RegExp["$1"], "5.0") >= 0; isMinSunOS5_5 = compareVersions(RegExp["$1"], "5.5") >= 0; }} window.onload = function(){ //这是我的环境 if(isMinIE6){ alert("当前浏览器是IE"); }if(isWinXP){ alert("当前系统是Windows XP"); } } </script> <body> </body></html>

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