Posted on 2007-12-22 23:08
探佚 阅读(604)
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CSS/JavaScript/AJAX
真正懂的人会知道这些代码的价值...这些代码出自<<javascript高级程序设计>>,自己已经测试过。
// 浏览器的useAgent信息
var sUserAgent = navigator.userAgent;
// 浏览器的版本信息
var fAppVersion = parseFloat(navigator.appVersion);
/**
*
* 通过传入的appVersion比较浏览器的版本高低
* @param sVersion1
* @param sVersion2
* @return int
*/
function compareVersions(sVersion1,sVersion2){
var aVersion1 = sVersion1.split(".");
var aVersion2 = sVersion1.split(".");
if(aVersion1.length > aVersion2.length){
for(var i = 0 ; aVersion1.length - aVersion2.length ; i++){
aVersion2.push("0");
}
}else if (aVersion1.length < aVersion2.length){
for(var i = 0 ; aVersion2.length - aVersion1.length ; i++){
aVersion1.push("0");
}
}
for(var i = 0 ; i < aVersion.length ; i++){
if(aVersion1[i] > aVersion2[i]){
return 1;
}else if(aVersion1[i] > aVersion2[i]){
return -1
}else{
return 0;
}
}
}
/**
*
* 检测Opera
*
*/
// 判断是否是Opera浏览器
var isOpera = sUserAgent.indexOf("Opera") > -1;
// 检测Opera浏览器的版本号
var isMinOpera4 = isMinOpera5 = isMinOpera6 = isMinOpera7 = isMinOpera7_5 = false;
if(isOpera){
var fOperaVersion;
if(navigator.appName == "Opera"){
fOperaVersion = fAppVersion;
}else{
var reOperaVersion = new RegExp("Opera (\\d+\\.\\d+)");
reOperaVersion.test(fOperaVersion);
fOperaVersion = parseFloat(RegExp["$1"]);
}
isMinOpera4 = fOperaVersion >= 4;
isMinOpera5 = fOperaVersion >= 5;
isMinOpera6 = fOperaVersion >= 6;
isMinOpera7 = fOperaVersion >= 7;
isMinOpera7_5 = fOperaVersion >= 7.5;
}
/**
*
* 检测IE
*
*/
// 判断是否是IE浏览器
var isIE = (sUserAgent.indexOf("compatible") > -1) &&
(sUserAgent.indexOf("MSIE") > -1) &&
(!isOpera);
// 检测IE浏览器的版本号
var isMinIE4 = isMinIE5 = isMinIE5_5 = isMinIE6 = isMinIE7 = false;
if(isIE){
var reIE = new RegExp("MSIE (\\d+\\.\\d+)");
reIE.test(sUserAgent);
var fIEVersion = parseFloat(RegExp["$1"]);
isMinIE4 = fIEVersion >= 4;
isMinIE5 = fIEVersion >= 5;
isMinIE5_5 = fIEVersion >= 5.5;
isMinIE6 = fIEVersion >= 6;
isMinIE7 = fIEVersion >= 7;
}
/**
*
* 检测Konquersor/Safari
*
*/
// 判断浏览器是否是基于KHTML项目
var isKHTML = (sUserAgent.indexOf("KHTML") > -1) ||
(sUserAgent.indexOf("Konqueror") > -1) ||
(sUserAgent.indexOf("AppleWebKit") > -1);
// 检测浏览器的版本号
var isMinSafari1 = isMinSafari1_2 = false;
var isMinKonq2_2 = isMinKonq3 = isMinKonq3_1 = isMinKonq3_2 = false;
if(isKHTML){
var isSafari = sUserAgent.indexOf("AppleWebKit") > -1;
var isKonq = sUserAgent.indexOf("Konqersor") > -1;
if(isSafari){
var reAppleWebKit = new RegExp("AppleWebKit\\/(\\d+(?:\\.\\d*)?)");
reAppletWebKit.test(sUserAgent);
var fAppleWebKitVersion = parseFloat(RegExp["$1"]);
isMinSafari1 = fAppleWebKitVersion >= 85;
isMinSafari1_2 = fAppleWebKitVersion >= 124;
}else if(isKonq){
var reKonq = new RegExp("Konquersor\\/(\\d+(?:\\.\\d+(?:\\.\\d)?)?)");
reKonq.test(sUserAgent);
isMinKonq2_2 = compareVersions(RegExp["$1"],"2.2") >= 0;
isMinKonq3 = compareVersions(RegExp["$1"],"3.0") >= 0;
isMinKonq3_1 = compareVersions(RegExp["$1"],"3.1") >= 0;
isMinKonq3_2 = compareVersions(RegExp["$1"],"3.2") >= 0;
}
}
/**
*
* 检测Mozilla
*
*/
// 判断是否是Mozilla浏览器
var isMozilla = (sUserAgent.indexOf("Gecko") > -1) && (!isKHTML);
// 检测Mozilla版本号
var isMinMozilla1 = isMinMozilla1_4 = isMinMozilla1_5 = false;
if(isMozilla){
var reMozilla = new RegExp("rv:(\\d+\\.\\d+(?:\\.\\d+)?)");
reMozilla.test(sUserAgent);
isMinMosilla1 = compareVersions(RegExp["$1"],"1.0") >= 0;
isMinMosilla1_4 = compareVersions(RegExp["$1"],"1.4") >= 0;
isMinMosilla1_5 = compareVersions(RegExp["$1"],"1.5") >= 0;
}
/**
*
* 检测Netscapse Communicator 4.x
*
*/
// 判断是否是NS4浏览器
var isNS4 = (!isIE) &&
(!isOpera) &&
(!isMozilla) &&
(!isKHTML) &&
(sUserAgent.indexOf("Mozilla") == 0) &&
(navigator.appName == "Netscapse") &&
(fAppVersion >= 4.0 && fAppVersion < 5.0);
// 检测NS4版本号
var isMinNS4 = isMinNS4_5 = isMinNS4_7 = isMinNS4_8 = false;
if(isNS4){
isMinNS4 = true;
isMinNS4_5 = fAppVersion >= 4.5;
isMinNS4_7 = fAppVersion >= 4.7;
isMinNS4_8 = fAppVersion >= 4.8;
}
/**
*
* 检测Windows95,98,ME,2000,XP
*
*/
var isWin = (navigator.platform == "Win32") || (navigator.platform == "Windows");
var isWin95 = isWin98 = isWinNT4 = isWin2K = siWinME = isWinXP = false;
if(isWin){
isWin95 = (sUserAgent.indexOf("Win95") > -1) || (sUserAgent.indexOf("Windows 95") > -1) ;
isWin98 = (sUserAgent.indexOf("Win98") > -1) || (sUserAgent.indexOf("Windows 95") > -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);
}
/**
*
* 检测Macintosh操作系统
*
*/
var isMac = (navigator.platform == "Mac68K") ||
(navigator.platform == "MacPPC") ||
(navigator.platform == "Macintosh");
var isMac68K = isMacPPC = false;
if(isMac){
isMac68K = (sUserAgent.indexOf("Mac_68000") > -1) || (sUserAgent.indexOf("68K") > -1);
isMacPPC = (sUserAgent.indexOf("Mac_PowerPPC") > -1) || (sUserAgent.indexOf("PPC") > -1);
}
/**
*
* 通过传入的appVersion比较操作系统的版本高低
* @param sVersion1
* @param sVersion2
* @return int
*/
function compareVersions(sVersion1,sVersion2){
var aVersion1 = sVersion1.split(".");
var aVersion2 = sVersion1.split(".");
if(aVersion1.length > aVersion2.length){
for(var i = 0 ; aVersion1.length - aVersion2.length ; i++){
aVersion2.push("0");
}
}else if (aVersion1.length < aVersion2.length){
for(var i = 0 ; aVersion2.length - aVersion1.length ; i++){
aVersion1.push("0");
}
}
for(var i = 0 ; i < aVersion.length ; i++){
if(aVersion1[i] > aVersion2[i]){
return 1;
}else if(aVersion1[i] > aVersion2[i]){
return -1
}else{
return 0;
}
}
}
/**
*
* 检测Unix操作系统
*
*/
var isUnix = (navigator.platform == "X11") && (!isWin) && (!isMac);
var isSunOS = isMinSunOS4 = isMinSunOS5 = isMinSunOS5_5 = false;
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;
}
}