jQuery Menu

Hello Experts -
I have a VERY simple ASP.NET page in which I am attempting to toggle between two menu items using jQuery.  The page code:
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="test.aspx.vb" Inherits="test" %>

<!DOCTYPE html>

<html>
<head runat="server">
    <title></title>
    <style type="text/css">
        .sel, .unsel{ margin-left:25px; font-size:10px; color:blue; }
        .sel { text-decoration:none; font-weight:bold; }
        .unsel { text-decoration:underline; font-weight:normal; }
        .unsel:hover { cursor:pointer; }
    </style>
    <script src="js/jquery-1.8.1.min.js" type="text/javascript"></script>
</head>
<body>
    <form id="form1" runat="server">
        <span class="sel">Menu 1</span>
        <span class="unsel">Menu 2</span>
    </form>
    <script type="text/javascript">
        $(document).ready(function () {
            $('.unsel').click(function () {
                $('.sel, .unsel').toggleClass('sel').toggleClass('unsel');
            });
        });
    </script>
</body>
</html>

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All I want the thing to do is toggle the menu items' CSS from bold/underline to non-bold/non-underline with each click of the non-active (underlined item).  The problem is that the click event is only firing when the 'Menu 2' item is clicked, not the 'unsel' item.  The logic is absurdly simple, but I can't seem to get it to work.  What am I doing wrong?

I'm using IE8, BTW..

One other thing, perhaps unrelated but about which I'm also curious..  I've noticed some odd markup in the generated source for the 'Menu 2' item.  It looks something like this:
<SPAN class="unsel" jQuery181020724113781910175="1">Menu 2</SPAN>

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What is that long jQuery##.. attribute?

Rick
MinnRickAsked:
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guru_samiConnect With a Mentor Commented:
try this:
$(function () {
            $('.unsel, .sel').on("click", function () {
                if ($(this).hasClass('unsel')) {
                    $('.sel').toggleClass("sel unsel");
                    $(this).toggleClass('unsel sel');
                }
            });
});

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Your answer to weird jquery attribute: http://stackoverflow.com/questions/3316991/jquery-is-adding-a-strange-attribute-to-nodes
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Chris StanyonConnect With a Mentor Commented:
It's not working because you bind the click event to elements with the 'unsel' class when the page first loads. You then add the 'unsel' class to a different element but that doesn't have the click event bound because it didn't have the 'unsel' class when the page was first loaded! Make sense? That's why you need to use the on() function instead of the click() function.

An alternative approach, instead of turning off one class and turning on another, is to simply add and remove a 'selected' class as needed. Needs a slight change to your styling, but have a look at this:

http://jsfiddle.net/ChrisStanyon/TYtc9/
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MinnRickAuthor Commented:
Both replies were most helpful, thank you very much!
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