How to determine if window.confirm() is supported?

Question

I have a mobile website that is used by various devices including some onboard computers running a locked down version of Windows Embedded 7 with IE 7. For some reason that I ca

Answer 1

How about:

if ('confirm' in window) {
    $(".logoff").click(function () {
        return window.confirm("Are you sure you want to log off?");
    });
}

Another options would be window.hasOwnProperty('confirm').