window.home()

[Telnet]

Всем привет
как проверить существует ли метод home в объекте window
делаkb. типа так
onclick="if('home' in window) {window.home()}"
не работает

[danik.js]

if('home' in window) { alert('home in window') }
else { alert('home is not in window') }

window.home = true;

if('home' in window) { alert('home in window') }
else { alert('home is not in window') }

if(window.home) { alert('home in window') }
else { alert('home is not in window') }

window.home = true;

if(window.home) { alert('home in window') }
else { alert('home is not in window') }

if(typeof home != 'undefined') { alert('home in window') }
else { alert('home is not in window') }

window.home = true;

if(typeof home != 'undefined') { alert('home in window') }
else { alert('home is not in window') }

[chipp]

window.hasOwnProperty('home')

[Deff]

alert(!!window.homeeee)

alert(!!window.home)