So erhalten Sie mithilfe von JavaScript Hardware- und Systeminformationen für den Client-Computer

JavaScript 获取客户端计算机硬件及系统信息 
通过WMI来实现获取客户端计算机硬件及系统信息: 

function getSysInfo(){ 
var locator = new ActiveXObject ("WbemScripting.SWbemLocator"); 
var service = locator.ConnectServer("."); 
//CPU信息 
var cpu = new Enumerator (service.ExecQuery("SELECT * FROM Win32_Processor")).item(); 
var cpuType=cpu.Name,hostName=cpu.SystemName; 
//内存信息 
var memory = new Enumerator (service.ExecQuery("SELECT * FROM Win32_PhysicalMemory")); 
for (var mem=[],i=0;!memory.atEnd();memory.moveNext()) mem[i++]={cap:memory.item().Capacity/1024/1024,speed:memory.item().Speed} 
//系统信息 
var system=new Enumerator (service.ExecQuery("SELECT * FROM Win32_ComputerSystem")).item(); 
var physicMenCap=Math.ceil(system.TotalPhysicalMemory/1024/1024),curUser=system.UserName,cpuCount=system.NumberOfProcessors 

return {cpuType:cpuType,cpuCount:cpuCount,hostName:hostName,curUser:curUser,memCap:physicMenCap,mem:mem} 
}

代码实现主要包括这几部分： 

先通过new ActiveXObject ("WbemScripting.SWbemLocator"); 访问到WbemScripting对象。 
通过locator.ConnectServer(".");连接我们本地电脑（.代表本地电脑，当然 
也可以访问其他计算机）。 
通过service.ExecQuery("SELECT * FROM Win32_Processor")这个类似sql的语句（其实系统信息也是存储在计算中一个类似数据库的文件中）获取我们需要的对象的记录集。 
通过new Enumerator来创建一个可枚举的对象，下面就可以遍历取信息了。 

注意：运行的前提是要修改浏览器安全设置，“允许对未标记为可安全执行的ActiveX 
脚本的运行”。 
这里主要取了CPU、内存及系统用户几个信息，大家利用WMI的API或者借助JSEDIT获取 
到更多的信息。下面列出了常用信息的类： 

Win32_Processor // CPU 处理器 

Win32_PhysicalMemory // 物理内存 

Win32_Keyboard // 键盘 

Win32_PointingDevice // 点输入设备，如鼠标 

Win32_DiskDrive // 硬盘驱动器 

Win32_CDROMDrive // 光盘驱动器 

Win32_BaseBoard // 主板 

Win32_BIOS // BIOS 芯片 

Win32_ParallelPort // 并口 

Win32_SerialPort // 串口 

Win32_SoundDevice // 多媒体设置 

Win32_USBController // USB 控制器 

Win32_NetworkAdapter // 网络适配器 

Win32_NetworkAdapterConfiguration // 网络适配器设置 

Win32_Printer // 打印机 

Win32_PrinterConfiguration // 打印机设置 

Win32_PrintJob // 打印机任务 

Win32_TCPIPPrinterPort // 打印机端口 

Win32_POTSModem // MODEM 

Win32_POTSModemToSerialPort // MODEM 端口 

Win32_DesktopMonitor // 显示器 

Win32_VideoController // 显卡细节。 

Win32_VideoSettings // 显卡支持的显示模式。 

Win32_TimeZone // 时区 

Win32_SystemDriver // 驱动程序 

Win32_DiskPartition // 磁盘分区 

Win32_LogicalDisk // 逻辑磁盘 

Win32_LogicalMemoryConfiguration // 逻辑内存配置 

Win32_PageFile // 系统页文件信息 

Win32_PageFileSetting // 页文件设置 

Win32_BootConfiguration // 系统启动配置 

Win32_OperatingSystem // 操作系统信息 

Win32_StartupCommand // 系统自动启动程序 

Win32_Service // 系统安装的服务 

Win32_Group // 系统管理组 

Win32_GroupUser // 系统组帐号 

Win32_UserAccount // 用户帐号 

Win32_Process // 系统进程 

Win32_Thread // 系统线程 

Win32_Share // 共享 

Win32_NetworkClient // 已安装的网络客户端 

Win32_NetworkProtocol // 已安装的网络协议 

WMI Win32类的完整信息及详细列表请参考MSDN: 
http://msdn2.microsoft.com/en-us/library/aa394084(VS.85).aspx 

示例： 

function button1_onclick() {//cpu 信息 
var locator = new ActiveXObject ("WbemScripting.SWbemLocator"); 
var service = locator.ConnectServer("."); 
var properties = service.ExecQuery("SELECT * FROM Win32_Processor"); 
var e = new Enumerator (properties); 
document.write("<table border=1>"); 
for (;!e.atEnd();e.moveNext ()) 
{ 
var p = e.item (); 
document.write("<tr>"); 
document.write("<td>" + p.Caption + "</td>"); 
document.write("<td>" + p.DeviceID + "</td>"); 
document.write("<td>" + p.Name + "</td>"); 
document.write("<td>" + p.CpuStatus + "</td>"); 
document.write("<td>" + p.Availability + "</td>"); 
document.write("<td>" + p.Level + "</td>"); 
document.write("<td>" + p.ProcessorID + "</td>"); 
document.write("<td>" + p.SystemName + "</td>"); 
document.write("<td>" + p.ProcessorType + "</td>"); 
document.write("</tr>"); 
} 
document.write("</table>"); 
} 

function Button2_onclick() {//CD-ROM 信息 
var locator = new ActiveXObject ("WbemScripting.SWbemLocator"); 
var service = locator.ConnectServer("."); 
var properties = service.ExecQuery("SELECT * FROM Win32_CDROMDrive"); 
var e = new Enumerator (properties); 
document.write("<table border=1>"); 
for (;!e.atEnd();e.moveNext ()) 
{ 
var p = e.item (); 
document.write("<tr>"); 
document.write("<td>" + p.Caption + "</td>"); 
document.write("<td>" + p.Description + "</td>"); 
document.write("<td>" + p.Drive + "</td>"); 
document.write("<td>" + p.Status + "</td>"); 
document.write("<td>" + p.MediaLoaded + "</td>"); 
document.write("</tr>"); 
} 
document.write("</table>"); 
} 

function Button3_onclick() {//键盘信息 
var locator = new ActiveXObject ("WbemScripting.SWbemLocator"); 
var service = locator.ConnectServer("."); 
var properties = service.ExecQuery("SELECT * FROM Win32_Keyboard"); 
var e = new Enumerator (properties); 
document.write("<table border=1>"); 
for (;!e.atEnd();e.moveNext ()) 
{ 
var p = e.item (); 
document.write("<tr>"); 
document.write("<td>" + p.Description + "</td>"); 
document.write("<td>" + p.Name + "</td>"); 
document.write("<td>" + p.Status + "</td>"); 
document.write("</tr>"); 
} 
document.write("</table>"); 
} 

function Button4_onclick() {//主板信息 
var locator = new ActiveXObject ("WbemScripting.SWbemLocator"); 
var service = locator.ConnectServer("."); 
var properties = service.ExecQuery("SELECT * FROM Win32_BaseBoard"); 
var e = new Enumerator (properties); 
document.write("<table border=1>"); 
for (;!e.atEnd();e.moveNext ()) 
{ 
var p = e.item (); 
document.write("<tr>"); 
document.write("<td>" + p.HostingBoard + "</td>"); 
document.write("<td>" + p.Manufacturer + "</td>"); 
document.write("<td>" + p.PoweredOn + "</td>"); 
document.write("<td>" + p.Product + "</td>"); 
document.write("<td>" + p.SerialNumber + "</td>"); 
document.write("<td>" + p.Version + "</td>"); 
document.write("</tr>"); 
} 
document.write("</table>"); 
}

另外，通过以下方式也可以获得系统的相关信息：

<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, &#39;Win32_NetworkAdapterConfiguration&#39;); 
</SCRIPT> 

<FORM id="formfoo" name="formbar" action="index.do" method="post"><INPUT value="00-11-11-B4-52-EF" name="txtMACAddr"> <INPUT value="210.42.38.50" name="txtIPAddr"> <INPUT value="zhupan" name="txtDNSName"> </FORM></BODY></HTML>

其实最关键的还是用到两个ActiveX： 
<OBJECT id=locator classid=CLSID:76A64158-CB41-11D1-8B02-00600806D9B6 VIEWASTEXT></OBJECT> 
<OBJECT id=foo classid=CLSID:75718C9A-F029-11d1-A1AC-00C04FB6C223></OBJECT> 
不过这两个ActiveX都是系统自带，不用去下载或注册。 
接下来的工作就是用脚本和ActiveX交互 

<HTML> 
<head> 
<script language="javascript" type="text/javascript"> 
function getCode(){ 
var locator = new ActiveXObject("WbemScripting.SWbemLocator"); 
var service = locator.ConnectServer("."); 
var properties = service.ExecQuery("SELECT * FROM Win32_NetworkAdapterConfiguration WHERE IPEnabled=TRUE"); 
var e = new Enumerator(properties); 
document.write("<table border=1>"); 
for (; !e.atEnd(); e.moveNext()) { 
var p = e.item(); 
//if(p.IPAddress(0)!=null && p.IPAddress(0)!="undefined" && p.IPAddress(0)!="0.0.0.0" && p.IPAddress(0)!="127.0.0.1"){ 
document.write("<tr>"); 
document.write("<td>" + p.ServiceName + "</td>"); 
document.write("<td>" + p.MACAddress + "</td>"); 
document.write("<td>" + p.IPAddress(0) + "</td>"); 
document.write("</tr>"); 
//break; 
//} 
} 
document.write("</table>"); 
} 
</script> 
</head> 
<BODY> 
<button id="TEST" value="test" onclick="getCode()">TEST</button> 
</BODY> 
</HTML> 

class Win32_NetworkAdapterConfiguration : CIM_Setting 
{ 
boolean ArpAlwaysSourceRoute; 
boolean ArpUseEtherSNAP; 
string Caption; 
string DatabasePath; 
boolean DeadGWDetectEnabled; 
string DefaultIPGateway[]; 
uint8 DefaultTOS; 
uint8 DefaultTTL; 
string Description; 
boolean DHCPEnabled; 
datetime DHCPLeaseExpires; 
datetime DHCPLeaseObtained; 
string DHCPServer; 
string DNSDomain; 
string DNSDomainSuffixSearchOrder[]; 
boolean DNSEnabledForWINSResolution; 
string DNSHostName; 
string DNSServerSearchOrder[]; 
boolean DomainDNSRegistrationEnabled; 
uint32 ForwardBufferMemory; 
boolean FullDNSRegistrationEnabled; 
uint16 GatewayCostMetric[]; 
uint8 IGMPLevel; 
uint32 Index; 
uint32 InterfaceIndex; 
string IPAddress[]; 
uint32 IPConnectionMetric; 
boolean IPEnabled; 
boolean IPFilterSecurityEnabled; 
boolean IPPortSecurityEnabled; 
string IPSecPermitIPProtocols[]; 
string IPSecPermitTCPPorts[]; 
string IPSecPermitUDPPorts[]; 
string IPSubnet[]; 
boolean IPUseZeroBroadcast; 
string IPXAddress; 
boolean IPXEnabled; 
uint32 IPXFrameType[]; 
uint32 IPXMediaType; 
string IPXNetworkNumber[]; 
string IPXVirtualNetNumber; 
uint32 KeepAliveInterval; 
uint32 KeepAliveTime; 
string MACAddress; 
uint32 MTU; 
uint32 NumForwardPackets; 
boolean PMTUBHDetectEnabled; 
boolean PMTUDiscoveryEnabled; 
string ServiceName; 
string SettingID; 
uint32 TcpipNetbiosOptions; 
uint32 TcpMaxConnectRetransmissions; 
uint32 TcpMaxDataRetransmissions; 
uint32 TcpNumConnections; 
boolean TcpUseRFC1122UrgentPointer; 
uint16 TcpWindowSize; 
boolean WINSEnableLMHostsLookup; 
string WINSHostLookupFile; 
string WINSPrimaryServer; 
string WINSScopeID; 
string WINSSecondaryServer; 
};