ActionScript 3.0 :: Loading A .swf, Keeps Loading Into New Window?

I am attempting to play with AS3 for the first time. I have a combo box that I need to load in different .swf files when something is selected in the combo box.
 
I have 2 functions, one will load a different url, based on what is in the data field for each item in the combo box when selected:

function changeHandler(event:Event):void { var request:URLRequest = new URLRequest();   request.url = ComboBox(event.target).selectedItem.data; navigateToURL(request);   aCb.selectedIndex = -1; }

The other function loads in a .swf which is what I want:
 
function changeHandler(event:Event):void { trace("you clicked me"); var loadit = new Loader(); addChild(loadit); loadit.load(new URLRequest("movie1.swf"));}

but it's not set up based on the selectedItem.data so it doesn't change based on what is selected in the combo box.

I'm not sure what needs replaced in the second function to get it work like the first with the selectedItem.data....?