how to call javascript function from dhtmlx windows to dhtmlx windows (communication between dhtmlx windows) like call javascript function from other iframe.
If you are attaching content to windows by ajax calls - they all they exists on the same level, so you can access content of any window by normal DOM operations.
If you are using attachURL with iframes - each window will be a separate iframe in fact , so you can access top window through parent
parent.dhxWins.window(id).doSomething();
where dhxWins - name of custom object, which was used for windows creation.