Required library edition:
Required library file: dhtmlxeditor.js

fires when the specified native event fires

• eventName - the event name. Possible values: 'focus', 'blur', 'click', 'keydown', 'keypress', 'keyup'.
• e - a native event object.

editor.attachEvent("onAccess",function(eventName,e){
     if(eventName == "blur"){
           alert("The editor is left!")
     }
})