javascript实现在网页中运行本地程序的方法

<input onclick="exec('notepad.exe')" value="执行noteppad.exe" type="button">
<input onclick="exec('cmd.exe')" value="执行cmd.exe" type="button">
<script language="javascript">
function exec(command)
{
window.oldOnError = window.onerror;
window._command = command;
window.onerror = function (err)
  {
 if (err.indexOf('utomation') != -1)
 {
  alert('命令' + window._command + ' 已经被用户禁止！');
  return true;
 }
 Else
  return false;
};
//-----------//
var wsh = new ActiveXObject('WScript.Shell');
if (wsh) wsh.Run(command);
wsh = null;
window.onerror = window.oldOnError;
}
</script>