JS获取当前操作系统与浏览器名称

var getOSAndBrowser = function(){
var os = navigator.platform;
var userAgent = navigator.userAgent;
var info  = "";
var tempArray  = "";
if(os.indexOf("Win") > -1){
if(userAgent.indexOf("Windows NT 5.0") > -1){
info += "Win2000";
}else if(userAgent.indexOf("Windows NT 5.1") > -1){
info += "WinXP";
}else if(userAgent.indexOf("Windows NT 5.2") > -1){
info += "Win2003";
}else if(userAgent.indexOf("Windows NT 6.0") > -1){
info += "WindowsVista";
}else if(userAgent.indexOf("Windows NT 6.1") > -1 || userAgent.indexOf("Windows 7") > -1){
info += "Win7";
}else if(userAgent.indexOf("Windows 8") > -1){
info += "Win8";
}else{
info += "Other";
}
}else if(os.indexOf("Mac") > -1){
info += "Mac";
}else if(os.indexOf("X11") > -1){
info += "Unix";
}else if(os.indexOf("Linux") > -1){
info += "Linux";
}else{
info += "Other";
}
info += "/";
if(/[Ff]irefox(\/\d+\.\d+)/.test(userAgent)){
tempArray = /([Ff]irefox)\/(\d+\.\d+)/.exec(userAgent);
info += tempArray[1] + tempArray[2];
}else if(/MSIE \d+\.\d+/.test(userAgent)){
tempArray = /MS(IE) (\d+\.\d+)/.exec(userAgent);
info += tempArray[1] + tempArray[2];
}else if(/[Cc]hrome\/\d+/.test(userAgent)){
tempArray = /([Cc]hrome)\/(\d+)/.exec(userAgent);
info += tempArray[1] + tempArray[2];
}else if(/[Vv]ersion\/\d+\.\d+\.\d+(\.\d)* *[Ss]afari/.test(userAgent)){
tempArray = /[Vv]ersion\/(\d+\.\d+\.\d+)(\.\d)* *([Ss]afari)/.exec(userAgent);
info +=  tempArray[3] + tempArray[1];
}else if(/[Oo]pera.+[Vv]ersion\/\d+\.\d+/.test(userAgent)){
tempArray = /([Oo]pera).+[Vv]ersion\/(\d+)\.\d+/.exec(userAgent);
info +=  tempArray[1] + tempArray[2];
}else{
info += "unknown";
}
return info;
};