ActionScript 3.0 :: Dynamic Url Within NavigateToURL?

currently i have the main scene and within this scene i have a button with the value bg_src Also in the scene is a movieclip containing several frames, each frame with a different image and stop();, a different button simply tells this movieclip to go to the next frame, the last frame in that movieclip returns it to the first frame, so it will continuously loop through the images when the button is clicked, one image at a time.

Problem i am having is that i want the button with the value bg_src to link to the original source of the background images when it is clicked, whilst remaining part of the main scene and not within the movieclip.

lets assume image1 was [URL] and image2 was [URL] clicking the background change button would switch the background image to the second image, and the background source button would then, instead of opening a new page to[URL] when clicked, would then open a page to [URL]instead.

The code i have thus far is as follows :

Code:

bg_src.addEventListener(MouseEvent.CLICK, onBgsrc, false, 0, true);
var buttontext:TextFormat = new TextFormat();
buttontext.font = "Verdana";
buttontext.color = 0x424647;

[code]....