Most elegant way to check sessionStorage support?

Question

I have a cookie checker function, which storage a value variable in the var 'cookie1'. And a sessionStorage storage cookie.

if (cookie1 == '9oz' | sessionStorage.getItem('sessionstoragecookie1') == '9oz')
{
    // execute code 1
}
else
{
    // execute code 2
}

But sessionStorage is not supported in IE6 and IE7. So it throws an error and breaks the entire script. I could do something like this, but this is absolutely not elegant. What is the most elegant way to work this around?

if (cookie1 == '9oz')
{
    // execute code 1
}
else
{
    if (typeof(sessionStorage) !='undefined')
    {
        if (sessionStorage.getItem('sessionstoragecookie1') == '9oz')
        {
            // execute code 1
        }
        else
        {
            // execute code 2
        }
    }

    else
        {
            // execute code 2
        }
}

Answer 1

if (cookie1 === '9oz' || (window.sessionStorage && window.sessionStorage.getItem('sessionstoragecookie1') === '9oz')) {
    // you've got a 9oz reference 
} else {
    // you haven't :(
}