[On Mouse Over] Toggle Class

[On Mouse Over] Toggle Class

Hi!
I make a plugin whit the effect Toggle Class and run when the cursors is over on the element, and when is left.
But, he is not Cross Browser compatible.

The script are:
  1.         $('.manzam').mouseover(function() {
                $('.manzam').toggleClass("manzam-o", 500);
                });
            $('.manzam').mouseout(function() {
                $('.manzam').toggleClass("manzam-o", 500);
                });




And the element are:
  1. <a class=".manzam">&nbsp;</a>
I use a jQuery 1.3.2-min and jquery effects 1.7.2
Why don't run whit Google Chrome, and make a differet effect in IE?
It possible see the example at this page http://www.wipestech.com/ita/organizzazione/

Thank to all,
and sorry for my bad english.