判断浏览器的js代码

<html> 
<head> 
 <meta http-equiv="Content-type" content="text/html; charset=gb2312"> 
 <title>JS 判断浏览器</title> 
</head> 
<body> 
<hr> 
 
<script type="text/javascript">

var browser=navigator.appName 
var b_version=navigator.appVersion 
var version=parseFloat(b_version) 
document.write("Browser name: "+ browser) 
document.write("
") 
document.write("Browser version: "+ version) 
</ script>

document.write("<p>Browser: ") 
document.write(navigator.appName + "</p>")

document.write("<p>Browserversion: ") 
document.write(navigator.appVersion + "</p>")

document.write("<p>Code: ") 
document.write(navigator.appCodeName + "</p>")

document.write("<p>Platform: ") 
document.write(navigator.platform + "</p>")

document.write("<p>Cookies enabled: ") 
document.write(navigator.cookieEnabled + "</p>")

document.write("<p>Browser's user agent header: ") 
document.write(navigator.userAgent + "</p>") 
</ script>

<hr>

<script type="text/javascript"> 
var x = navigator 
document.write("CodeName=" + x.appCodeName) 
document.write("
") 
document.write("MinorVersion=" + x.appMinorVersion) 
document.write("
") 
document.write("Name=" + x.appName) 
document.write("
") 
document.write("Version=" + x.appVersion) 
document.write("
") 
document.write("CookieEnabled=" + x.cookieEnabled) 
document.write("
") 
document.write("CPUClass=" + x.cpuClass) 
document.write("
") 
document.write("OnLine=" + x.onLine) 
document.write("
") 
document.write("Platform=" + x.platform) 
document.write("
") 
document.write("UA=" + x.userAgent) 
document.write("
") 
document.write("BrowserLanguage=" + x.browserLanguage) 
document.write("
") 
document.write("SystemLanguage=" + x.systemLanguage) 
document.write("
") 
document.write("UserLanguage=" + x.userLanguage) 
</ script> 
<hr>

<script type="text/javascript"> 
var browser=navigator.appName 
var b_version=navigator.appVersion 
var version=parseFloat(b_version) 
if ((browser=="Netscape"||browser=="Microsoft Internet Explorer") && (version>=4)) 
{ 
  document.write("Your browser is good enough!") 
   
} 
else 
{ 
  document.write("It's time to upgrade your browser!") 
}

</ script>

</body> 
</html>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

判断浏览器的js代码_基础知识