OnMouseOut
The OnMouseOut client-side event handler is called when the mouse moves off the input area of the control.
Two parameters are passed to the event handler:
sender is the input control.
eventArgs is an instance of Sys.EventArgs.
The following example uses the OnMouseOut event to display an alert:
<telerik:RadNumericTextBox RenderMode="Lightweight" ID="RadNumericTextBox1" runat="server">
<ClientEvents OnMouseOut="MouseOut" />
</telerik:RadNumericTextBox>
<script type="text/javascript">
function MouseOut(sender, eventArgs)
{
alert(sender.get_id());
}
</script>