I don't like the Way, the Navaigator displays the Data.
Let's say we have this Code:
var foo = {
    fooProp: null,
    fooFunc: function () {
        var localObject = {'foo': 1, 'bar': 2};
    }
};

Then the Navgator displays the following:
1.) 2 times "foo". One time as a variable and one time as an Object. Why we need the same name two times?
2.) It displays the localObject( it's only visible in the fooFunc scope ) on the toplevel. Why? 

When you work on large files( containing a lot of objects ), the navigator is simply unuseble, because it is totaly
overloaded.

I will add a screenshot to show this on a small object.

Probaly solutions:
to 1.) I think this is a bug. Nobody needs a name two times inside the navigator, so it should be fixed.
to 2.) Perhaps the display of the objects( which are not in the globle scope ) can be switched off using filters.

As an Example open the following file( It is an JavaScript Library ) and see that the navigator is completely
overloaded, useless and totaly confusing:
http://kevin.vanzonneveld.net/code/php_equivalents/php.namespaced.js

I allready mentioned this in another issue: http://www.netbeans.org/issues/show_bug.cgi?id=149001 

Greetings,
Stefan Sturm