OnClientItemOpened
The OnClientItemOpened client-side event occurs immediately after an item in the menu expands to show its child items.
The event handler receives two parameters:
The instance of the menu firing the event.
An eventArgs parameter containing the following methods:
get_item returns a reference to the RadMenuItem that was opened.
get_domEvent returns a reference to the DOM event that caused the opening.
You can use this event to initialize the list of child items:
<script type="text/javascript">
function ItemOpened(menu, args) {
var d = new Date();
var item = args.get_item();
var str = "";
if (item.get_text() == "Date") {
str = d.toLocaleDateString();
} else if (item.get_text() == "Time") {
str = d.toLocaleTimeString();
}
item.get_items().getItem(0).set_text(str);
}
</script>
<telerik:RadMenu RenderMode="Lightweight" ID="RadMenu1" runat="server" Flow="Horizontal" OnClientItemOpened="ItemOpened">
<Items>
<telerik:RadMenuItem runat="server" ExpandMode="ClientSide" Text="Time">
<Items>
<telerik:RadMenuItem runat="server" ExpandMode="ClientSide" />
</Items>
</telerik:RadMenuItem>
<telerik:RadMenuItem runat="server" ExpandMode="ClientSide" Text="Date">
<Items>
<telerik:RadMenuItem runat="server" ExpandMode="ClientSide" />
</Items>
</telerik:RadMenuItem>
</Items>
</telerik:RadMenu>