<div id="divBox">
Wish List<br /> <br />
<asp:DataList ID="GiftDataListDetail" OnItemDataBound="GiftDataListDetail_ItemDataBound"
runat="server" DataKeyField="GiftRegistryID">

<ItemTemplate>
<asp:Panel ID="meterbar2" runat="server" CssClass="meterbar">
<%--data --%>
</asp:Panel>
</div>
<div class="buybutton"><asp:LinkButton ID="buybutton2" CssClass="buylink" runat="server"/></div>

now in your ItemDataBound event in code behind file -

protected void GiftDataListDetail_ItemDataBound(object source, DataListItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
Product info = (Product)e.Item.DataItem;
if (!string.IsNullOrEmpty(info.Name))
{

LinkButton hlnk = (LinkButton)e.Item.FindControl("buybutton2");
Panel pan = (Panel)e.Item.FindControl("meterbar2");

hlnk.Attributes.Add("productDescription",pan.ClientID);
}
}
}

at last use jquery in script section to show/hide panel on button click -

$("div#divBox .buylink2").click(function (e) {
e.preventDefault();
var panelid = "";
var currentObjId = (this.id);
panelid = $("a#" + currentObjId).attr('desc');

var realid = $("[id$=" + panelid + "]").attr("id");
$("#" + realid + "").slideToggle("slow");

});

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