Try this code:
<script type="text/javascript">
$(document).ready(function (e) {
$(".AnimatedLabel").each(function (i) {
$(this).delay(i * 500).fadeIn();
});
});
</script>
<style type="text/css">
.AnimatedLabel
{
display: none;
}
</style>
<asp:repeater runat="server" id="repeater1">
<itemtemplate>
<asp:label runat="server" id="lbl" text="<%#Eval("ename") %>" cssclass="AnimatedLabel"></asp:label>
<br />
</itemtemplate>
</asp:repeater>