JS获取硬件信息是通过ActiveX进行获取的，因此只能IE浏览器支持，火狐不支持

 而且必须降低浏览器安全级别，因此不到万不得以一般不会采用这种方式

<html>
<head>
    <title>WMI Scripting HTML</title>
    <meta http-equiv="Content-Type" content="text/html; charset=gb2312">
    <script language="JScript" event="OnCompleted(hResult,pErrorObject, pAsyncContext)"
            for="foo">        
document.forms[0].txtMACAddr.value=unescape(MACAddr);
document.forms[0].txtIPAddr.value=unescape(IPAddr);
document.forms[0].txtDNSName.value=unescape(sDNSName);
//document.formbar.submit();
    
    </script>
    <script language="JScript" event="OnObjectReady(objObject,objAsyncContext)" for="foo">
  if(objObject.IPEnabled != null && objObject.IPEnabled != "undefined" && objObject.IPEnabled == true)
  {
   if(objObject.MACAddress != null && objObject.MACAddress != "undefined")
   MACAddr = objObject.MACAddress;
   if(objObject.IPEnabled && objObject.IPAddress(0) != null && objObject.IPAddress(0) != "undefined")
   IPAddr = objObject.IPAddress(0);
   if(objObject.DNSHostName != null && objObject.DNSHostName != "undefined")
   sDNSName = objObject.DNSHostName;
   }
    </script>
    <meta content="MSHTML 6.00.2800.1106" name="GENERATOR">
</head>
<body>
    <object id="locator" classid="CLSID:76A64158-CB41-11D1-8B02-00600806D9B6" viewastext>
    </object>
    <object id="foo" classid="CLSID:75718C9A-F029-11d1-A1AC-00C04FB6C223">
    </object>
    <script language="JScript">     
        var service = locator.ConnectServer();
        var MACAddr;
        var IPAddr;
        var DomainAddr;
        var sDNSName;
        service.Security_.ImpersonationLevel = 3;
        service.InstancesOfAsync(foo, 'Win32_NetworkAdapterConfiguration');
    
    </script>
    <form id="formfoo" name="formbar" action="NICPost.asp" method="post">
    <input value="" name="txtMACAddr">
    <input value="" name="txtIPAddr">
    <input value="" name="txtDNSName">
    </form>
</body>
</html>