JS获取客户端信息(屏幕分辨率、浏览器版本、操作系统版本)

废话就不多说了，直接上JS代码，如下：

/**
* 获取浏览器版本
* @returns
*/
function getBrowserInfo(){
var agent = navigator.userAgent.toLowerCase() ;
var regStr_ie = /msie [\d.]+;/gi;
var regStr_ff = /firefox\/[\d.]+/gi;
var regStr_chrome = /chrome\/[\d.]+/gi;
var regStr_saf = /safari\/[\d.]+/gi;
//IE
if(agent.indexOf("msie") > 0){
return agent.match(regStr_ie) ;
}

//firefox
if(agent.indexOf("firefox") > 0){
return agent.match(regStr_ff) ;
}

//Chrome
if(agent.indexOf("chrome") > 0){
return agent.match(regStr_chrome) ;
}

//Safari
if(agent.indexOf("safari") > 0 && agent.indexOf("chrome") < 0){
return agent.match(regStr_saf) ;
}
}
/**
* 获取操作系统版本
* @returns {String}
*/
function detectOS() {
var sUserAgent = navigator.userAgent;
var isWin = (navigator.platform == "Win32") || (navigator.platform == "Windows");
var isMac = (navigator.platform == "Mac68K") || (navigator.platform == "MacPPC") || (navigator.platform == "Macintosh") || (navigator.platform == "MacIntel");
if (isMac) return "Mac";
var isUnix = (navigator.platform == "X11") && !isWin && !isMac;
if (isUnix) return "Unix";
var isLinux = (String(navigator.platform).indexOf("Linux") > -1);
if (isLinux) return "Linux";
if (isWin) {
var isWin2K = sUserAgent.indexOf("Windows NT 5.0") > -1 || sUserAgent.indexOf("Windows 2000") > -1;
if (isWin2K) return "Win2000";
var isWinXP = sUserAgent.indexOf("Windows NT 5.1") > -1 || sUserAgent.indexOf("Windows XP") > -1;
if (isWinXP) return "WinXP";
var isWin2003 = sUserAgent.indexOf("Windows NT 5.2") > -1 || sUserAgent.indexOf("Windows 2003") > -1;
if (isWin2003) return "Win2003";
var isWinVista= sUserAgent.indexOf("Windows NT 6.0") > -1 || sUserAgent.indexOf("Windows Vista") > -1;
if (isWinVista) return "WinVista";
var isWin7 = sUserAgent.indexOf("Windows NT 6.1") > -1 || sUserAgent.indexOf("Windows 7") > -1;
if (isWin7) return "Win7";
}
return "other";
}

/**
* 获取屏幕分辨率
* @returns {String}
*/
function getScreenResolution(){
return window.screen.width+"*"+window.screen.height;
}