Professional :: Flash Movie OnClick To Go To URL?

I have a simple movie consisting of 6 layers (photos). Each layer is set to display for 30 frames then fades into the next layer to give the impression of a slideshow. I have used a code snippet against the 1st layer so that if the mouse button is clicked it will go to a particular website.
 
movieClip_2.addEventListener(MouseEvent.CLICK, fl_ClickToGoToWebPage_6);
 
function fl_ClickToGoToWebPage_6(event:MouseEvent):void
{
navigateToURL(new URLRequest("http:blahblah.com"), "_self");
}
 
This works fine, however, once the clip goes beyond layer 1, if you press the mouse button again, it still goes to the web site specified even though I do not want it too. I have tried to add a second code snippet so that if it is on the 2nd layer it goes to a different web page and so on, for each layer, wanting it to go to a different web page. If I have more than 1 code snippet, as soon as it gets to the frame the snippet is on, it fails, and if I only have the 1 snippet, it runs for the entire duration of the clip