[Moo] 1.2 dropdown menu not working on IE9

[thesaltydog]

Hi,

my mootools 1.2 dropdown menu is performing without errors on Firefox.
Today I have tested it on IE9 and it is not working.
Is there any special trick for this browser?


it is claiming for a function error on this line:

                   if (!el.hasSub) {
                        el.addEvent('mouseenter', function() {
---------------->         el.setActive();
                            return false;
                        });

 where setActive is defined this way:

        setActive: function() {
            this.className+='sfhover';
        },


Thanks for any suggestion.