<script type="text/javascript">
function onClicking(sender, eventArgs)
{
var item = eventArgs.get_item();
var proceed = confirm("Permanently delete this Date and ALL samples under it?");
if (!proceed)
{
eventArgs.set_cancel(true);
}
}
</script>
<telerik:RadTreeViewContextMenu runat="server" ID="ChemicalDateMenu" ClickToOpen="True" Skin="Vista" OnClientItemClicking="onClicking">
<Items>
<telerik:RadMenuItem Text="Add New Sample" Value="ChemicalAdd" runat="server"></telerik:RadMenuItem>
<telerik:RadMenuItem Text="Delete Sample" Value="ChemicalDelete" runat="server"></telerik:RadMenuItem>
</Items>
<CollapseAnimation Duration="200" Type="OutQuint" />
</telerik:RadTreeViewContextMenu>
Thx Marcel