ItemExpanded プロパティ (DataMenuClientEvents)

// The client event 'ItemExpanded' takes two parameters sender and e
// sender  is the object which is raising the event
// e is the DataMenuItemCancelEventArgs
function WebDataMenu1_ItemExpanded(sender, e) {
    //Gets the DataMenuItem object that is expanded
    var Item = e.getItem();

    //Gets the text of the expanded item
    var ItemText = Item.get_text();

    alert("Item '" + ItemText + "'Expanded!!!");

}