Update specific child to tableView row from a child window?

I'm trying to update a imageView child to my tableView row from a child window.

I've done this so far

news.js (my first window)

win2.addEventListener("updateBookmarkIcon",function(data){
 var rowCdata = tableView.getIndexByName(''+data.rowname+''); 
alert(rowCdata);
});

And then in viewnews.js (child window to news.js)

var newdata = {title:title, rowname:''+rowname+''}; 
win.fireEvent("updateBookmarkIcon",newdata);

This works great I'm getting the rowname as expected.

But I want to hide()/show() a imageView inside my tableView row which is created like this in news.js

var row = Titanium.UI.createTableViewRow({
                                        height:74,
                                        backgroundImage:'images/viewbg1.png',
                                        selectedBackgroundImage:'images/viewbg2.png',
                                        rightImage:'images/arrow.png',
                                        selectionStyle:Titanium.UI.iPhone.TableViewCellSelectionStyle.GRAY,
                                        backgroundLeftCap:10,
                                        backgroundTopCap:10
                                    });
var bookmark_icon = Titanium.UI.createImageView({
backgroundImage:'images/favorit.png',
top:0, right:-22, height:20, width:20 }); 


bookmark_icon is then added to my "row" like this:

row.add(bookmark_icon);

Is it possible to update a child with this approach? I don't want to rebuild my entire row just to hide/show a child image inside the row.