The following events are available in dhtmlxLayout:

• onDock/onUndock Events - occurs when the user clicks the left mouse button on item's button “Dock”/“Undock”;
• ResizeFinish Event - occurs when the user finishes resizing the Layout;
• onPanelResizeFinish Event - occurs when the user finishes resizing an item;
• onExpand Event - occurs when an item is being expanded;
• onCollapse Event - occurs when an item is being collapsed.

The user can add any user-defined handler to any of the available events.

To do this the user can use attachEvent() method with the following parameters:

• evName - name of the event;
• evHandler - user-defined event handler.

    <script>
        dhxLayout.attachEvent(evName, evHandler);
    </script>

Note: the names of the events are case-insensitive.