Required library edition:
Required library file: dhtmlxfolders.js

adds any user-defined handler to available events

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

  myFolders.attachEvent("onclick",function(id){
    alert("Item ID is: "+id)
  })

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.