how can i change div position so that it shows up ontop of column

What I want: I have a gridview, if user hoverover col#4, than I want to show div (custom tooltip). if user hover out side of col#4 than hide div

Issue: How can I style so that ToolTipPanel shows up on top of col#4? so that it looks more of a tooltip rather than some random div ontop of file. Note gridview & col size can change depending on screensize or data size

Html - I have a panel which I am using as Custom ToolTip and a gridview

        <asp:Panel ID="ToolTipPanel" class="ToolTipPanelC">
            <div style="border:1px solid black; background:color:yellow;">
                <p>Executive/Management Defendant, Owner Defendant</p>
            </div>
        </asp:Panel>

 <asp:GridView  ...>
   ...
    <asp:TemplateField HeaderText="col4" SortExpression="col4">
       <ItemTemplate>
         <asp:Label ID="col4S" runat="server" Text='<%# Eval("col4") %>'></asp:Label>
       </ItemTemplate>
      </asp:TemplateField>
   ...
</asp:GridView>

Back-end Code - here call js functions

  Protected Sub OnRowDataBound(sender As Object, e As GridViewRowEventArgs)
    If e.Row.RowType = DataControlRowType.Header Then
        e.Row.Cells(4).Attributes("onmouseover") = "javascript:showToolTip();"
        e.Row.Cells(4).Attributes("onmouseout") = "javascript:hideToolTip();"
    End If


End Sub

Javascript Hide or show div

<script type="text/javascript">
    function showToolTip() {
        var x = document.getElementById("ToolTipPanel");
        x.style.display = "block";
    }
    function hideToolTip() {
        var x = document.getElementById("ToolTipPanel");
        x.style.display = "none";
    }

</script>

Via Active questions tagged javascript - Stack Overflow https://ift.tt/2qp0xyK