Is 'next' a reserved Javascript identifier?

Is 'next' a reserved Javascript identifier? The following code of mine was silently failing (in FF 3) to create the object's key/value pair when the key was 'next'. However, when I switched my keys from prev/next to navPrev and navNext, the object gets constructed as I expected.

        var unimplementedNavEvent = function() {console.log('Un-implemented Page Navigation Event')};
        var navigationEventStubs = [];

        for (var i=0, n=pages.length; i<n; i++) {
            var pageNavEvents = {href: pages[i], navEvents: {}};
            if (i !== 0) {
                pageNavEvents.navEvents.prev = unimplementedNavEvent;
            }
            if (i < n-1) {
                pageNavEvents.navEvents.next = unimplementedNavEvent;
         开发者_JAVA技巧   }
            navigationEventStubs.push(pageNavEvents);
        }

Nope, check out this list of reserved JavaScript keywords:

http://www.quackit.com/javascript/javascript_reserved_words.cfm

Edit:

Actually, there would appear to be some use of the word as a function in JavaScript 1.7 gerator/iterators

https://developer.mozilla.org/en/New_in_JavaScript_1.7

Are you using Prototype or another Javascript framework? next is part of Prototype's ultimate DOM traversal tookit:

http://www.prototypejs.org/api/element/next