怎么用js获取客户端的信息_WEB开发

怎么用js获取客户端的信息?今天我发现这样一篇文章便可以读取用户很多的相关信息就像google一样,判断用广告是否被点击等.

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
      <head>
            <title></title>
            <meta name="GENERATOR" content="Microsoft Visual Studio .NET
7.1">
            <meta name="vs_targetSchema"
content="http://schemas.microsoft.com/intellisense/ie5">
      <script id=clientEventHandlersJS language=javascript>
<!--

function Button2_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 Button1_onclick() {//软盘信息
      var locator = new ActiveXObject ("WbemScripting.SWbemLocator");
      var service = locator.ConnectServer(".");
      var properties = service.ExecQuery("SELECT * FROM Win32_FloppyDrive");
      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.DeviceID + "</td>");
            document.write("<td>" + p.Status + "</td>");
            document.write("<td>" + p.Manufacuturer + "</td>");
            document.write("</tr>");
      }
      document.write("</table>");
}

function Button1_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 Button1_onclick() {//键盘信息息
      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 Button1_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>");
}

//-->
</script>
</head>
      <body>
            <INPUT id="Button1" type="button" value="Button"
name="Button1" language=javascript onclick="return Button1_onclick()">
      </body>
</html>

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怎么用js获取客户端的信息