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>