下面代码显示的操作系统平台是win32,但是我的64位系统啊,为什么
document.write(window.navigator.appCodeName+"<br/>");
document.write(window.navigator.appName+"<br/>");
document.write(window.navigator.appVersion+"<br/>")
document.write(window.navigator.platform+"<br/>")
document.write(window.navigator.userAgent+"<br/>")