64bitOS上でx86/x64どっちのcscript.exeを起動するか選びたいときに

bit.js.cmd

@if(0)==(0) echo off
::
:: get cmd.exe and cscript.exe
::  SysNative alias is avalable if this is 32bit-cmd.exe on 64bit-system.
::  %WinDir%\SysNative\cmd.exe is 64bit-cmd.exe.
::
set CSCRIPT32=
set CSCRIPT64=
set CMD32=
set CMD64=
if exist %WinDir%\SysNative\cmd.exe (
  ::echo "32bit-cmd.exe on 64bit-Windows"
  set CSCRIPT32=cscript
  set CSCRIPT64=
  set CMD32=%comspec%
  set CMD64=%WinDir%\SysNative\cmd.exe
) else (
  if "%PROCESSOR_ARCHITECTURE%" == "x86" (
    ::echo "32bit-cmd.exe on 32bit-Windows"
    set CSCRIPT32=cscript
    set CSCRIPT64=
    set CMD32=%comspec%
    set CMD64=
  ) else (
    ::echo "64bit-cmd.exe on 64bit-Windows"
    set CSCRIPT32=%windir%\SysWOW64\cscript.exe
    set CSCRIPT64=cscript
    set CMD32=%WinDir%\SysWOW64\cmd.exe
    set CMD64=%comspec%
  )
)
::
:: run if 64bit-cscript found
::
if "%CSCRIPT64%" == "" (
  if "%CMD64%" == "" (
    :: 32bit-Windows
    "%CSCRIPT32%" //nologo //E:JScript "%~f0" %*
    set JSCRIPTRETURN=%ERRORLEVEL%
    exit /b %JSCRIPTRETURN%
  ) else (
    :: 64bit-Windows - call 64bit-cmd.exe
    "%CMD64%" /C "%~f0" %*
    set JSCRIPTRETURN=%ERRORLEVEL%
    exit /b %JSCRIPTRETURN%
  )
) else (
  :: 64bit-cscript.exe
  "%CSCRIPT64%" //nologo //E:JScript "%~f0" %*
  set JSCRIPTRETURN=%ERRORLEVEL%
  exit /b %JSCRIPTRETURN%
)
exit /b %ERRORLEVEL%
@end

WScript.Echo(WScript.FullName)