When I move mouse over the container panel, the child panel is displayed but as soon as i move mouse over the child panel, the mouseout event is triggered and panel get hidden.

This is simplified version of my code because panels are located inside gridview and therefore i can't use document.getElementById("panelchild") as it is (the js will get the specific id latter), but for now i want to make it work for this simple case.

This is the partial script:

<script type="text/javascript">
        function ShowPanel(e) {
            // e = e || window.event;
            //  var evtSrc = e.target || e.srcElement;          

            var panel = document.getElementById("panelchild")
            if (panel.style.display == "none")
                panel.style.display = "";
            else
                panel.style.display = "none";           
        }

</script>

This is the markup:

<asp:Panel id="panelContainer" runat="server" onmouseover="ShowPanel(event)" onmouseout="ShowPanel(event)" >
   <asp:HyperLink ID="lnkTitle" runat="server" style="float:left;margin-right:10px;" Text="This is title" NavigateUrl="www" />            
   <asp:Panel id="panelchild" runat="server"  style="display:none" >                
        <a id="A1" href="javascript: void(0);" style="text-decoration: none;">
             <img src="mylocalsite/images/Misc_Edit.gif" style="border:0px;float:left;" /> 
         </a>  
   </asp:Panel>
</asp:Panel>