C# - UpdatePanel Breaks JQuery Script - Hide / Show Stuff

This is a simplified version of what I want to do. Basically I have a datalist with a bunch of stuff in it and when you mouseover items in the datalist I want jquery to hide/show stuff. The problem is that after I databind my gridview/repeater/datalist jquery quits working if the gridview/repeater/datalist is in an update panel. After you click the button in the sample below, the jquery that makes the span show up when you mouse over quits working. Any ideas of why this is happening, how to fix it or a better way to do this?

<script type="text/javascript">
$(document).ready(function() {
$('.comment-div').mouseenter(function() {
jQuery("span[class=mouse-hide]", this).fadeIn(50);
});
$('.comment-div').mouseleave(function() {
jQuery("span[class=mouse-hide]", this).fadeOut(50);
});
});
</script>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<div class="comment-div">
<asp:GridView ID="GridView1" runat="server">
</asp:GridView>
<span class="mouse-hide" style="display: none;">sdfgsdfgsdfgsdfg</span>.......................