i want to "open URL" link in my function on thumb.

function callThumbs() {

                                        root.createEmptyMovieClip("wall",root.getNextHighestDepth());

                                          wall._x = root.galleryx=0;

                                          wall._y = root.galleryy=230;

wall.addEventListener(MouseEvent.CLICK);

                                            var clipLoader = new MovieClipLoader();

                                            var preloader = new object();

                                            clipLoader.addListener(preloader);

for(i=0; i<1;  i++) { 

                            thumbURL = myImages.attributes.thumb_url;     

myThumb_mc = wall.createEmptyMovieClip(i,wall.getNextHighestDeph());      

myThumb_mc._x = root.thumbheight*    

myThumb_mc._x = root.thumbposition=-3260;         

clipLoader.loadClip("thumbs/"thumbURL,myThumb_mc);

};

};