navigator.userAgent，通过该参数，可以获得操作系统和浏览器内核信息。userAgent 属性是一个只读的字符串，声明了浏览器用于 HTTP 请求的用户代理头的值。.
<HTML><HEAD><TITLE>WMI Scripting HTML</TITLE>
<META http-equiv=Content-Type content="text/html; charset=gb2312">
<script>
function validBrowser(){
var u_agent = navigator.userAgent;
var browser_name='Failed to identify the browser';
if(u_agent.indexOf('Firefox')>-1){
browser_name='Firefox';
}else if(u_agent.indexOf('Chrome')>-1){
browser_name='Chrome';
}else if(u_agent.indexOf('Trident')>-1&&u_agent.indexOf('rv:11')>-1){
browser_name='IE11';
}else if(u_agent.indexOf('MSIE')>-1&&u_agent.indexOf('Trident')>-1){
browser_name='IE(8-10)';
}else if(u_agent.indexOf('MSIE')>-1){
browser_name='IE(6-7)';
}else if(u_agent.indexOf('Opera')>-1){
browser_name='Opera';
}else{
browser_name+=',info:'+u_agent;
}
document.write('browser_name:'+browser_name+'<br>');
document.write('u_agent:'+u_agent+'<br>');
}
</script>
<body onload="validBrowser()">
</body>
</html>来源：CSDN
作者：panpan_chen
链接：https://blog.csdn.net/chen8238065/article/details/44786781