[jQuery] .each - how to write in my code?

[jQuery] .each - how to write in my code?


Hello,
I am very new to jQuery and don´t know how to write my code for every
item.
Here is my code for a list with hover functions, I would like for
every item to be processed separately. I know about a functio that is
written ".each", but can´t seem to get it to work.
-------
<script type="text/javascript">
    $(function() {
        // set opacity to nill on page load
        $("ul#menu span").css("opacity","0");
        $("ul#menu li").each(function () {
// on mouse over
            $("ul#menu a").hover(function () {
                // animate opacity to full
                $('ul#menu span').stop().animate({
                    opacity: 1
                }, 'slow');
            },
            // on mouse out
            function () {
                // animate opacity to nill
                $('ul#menu span').stop().animate({
                    opacity: 0
                }, 'slow');
            });
        });
    });
</script>
-------
hope someone has some answers or a book to recommend for a newbie.
Regards
/adesign