WebMonthCalendar1.ClientEvents.Focus = "WebMonthCalendar1_Focus"WebMonthCalendar1.ClientEvents.Focus = "WebMonthCalendar1_Focus";// The client event 'Focus' takes two parameters sender and e // sender is the object which is raising the event // e is the EventArgs function WebMonthCalendar1_Focus(sender, e) { alert("Calendar gained focus!"); }