Need help: button - get url

i’m using a scrolling portfolio menu which contains a single image movie clip that duplicates itself based on the # of external images loading. it currently contains a button and i want to use the button to get a url.

my problem is that there is only one button in the .fla, obviously. any ideas what type of scripting i need?

here’s some of the current script:
while (i<=numItems) {
duplicateMovieClip(img_mc, “img_mc”+i, i);
//Load images
loadMovie(“image”+i+".jpg", this[“img_mc”+i].holder);
loadMovie(“image”+i+".jpg", this[“img_mc”+i].reflection.holder);
//Smooth loaded images
smoothImageLoad(“image”+i+".jpg", this[“img_mc”+i].holder);
smoothImageLoad(“image”+i+".jpg", this[“img_mc”+i].reflection.holder);
clip = this[“img_mc”+i];
clip.x = 0;
clip.y = 0;
clip.angle = i*(360/numItems);
var blur = new flash.filters.BlurFilter();
clip.tempFilter = clip.filters;
clip.tempFilter.push(blur);