Hi Mo, something like this for a script to find the node editor object from script running outside of the node editor dialog.

    var uipanels = moi.ui.getUIPanels();

    for ( var i = 0; i < uipanels.length; ++i )
    {
        var uipanel = uipanels.item(i);

        // uipanel is the HTML window object that holds global variables.

       // Find the one that has "nodeeditor" somewhere in it's URL:

       moi.ui.alert( uipanel.document.URL );

    }

If there is a global variable on the node editor dialog named LiteGraph then you should be able to do uipanel.LiteGraph.editor

- Michael