Required library edition:
Required library file: dhtmlxlayout.js

attaches an event handler to a dhtmlxLayout

• original - event's original name;
• catcher - event handler;
• CallObj - object that will call the event.

Several handlers can be attached to one and the same event, and all of them will be executed.

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

    dhxLayout.attachEvent("onExpand",function(id){
        alert("Cell "+id+" was expanded.");
    });
    // or
    function doOnExpand(id) {
        alert("Cell "+id+" was expanded.");
    }
    dhxLayout.attachEvent("onExpand", doOnExpand);