Gallery on loadEvent

programming flash
1

Hi
This Gallery-Thumbs-Slider is told to appear with

btn1.onRelease = function() {
 slider.setGal(thumbnails1, images1); 
};

Code inside the Thumbs-Slider

var thumb = new Array();
var images = new Array();
var big_images = new Array();
var left = 0;
var right = 0;
// Checking distance between thumbnails
var distance = 0;
var tester = container.attachMovie("thumbnail", "tester", 0);
distance = int(tester._width+5);
// Gap between thumbs
tester.removeMovieClip();
// Set Galery
function setGal(arr, big_arr) {
 thumb = new Array();
 images = new Array();
 big_images = new Array();
 
 images = arr;
 big_images = big_arr;
 container._visible = false;
 for (var i = 0; i<arr.length; i++) {
  thumb* = container.createEmptyMovieClip("loader"+i, i);
  thumb*.createEmptyMovieClip("img", 1);
  thumb*.img.loadMovie(arr*);
 }
 preload();
}
// Preload images
function preload() {
 for (var i = 0; i<thumb.length; i++) {
  thumb*.stime = getTimer();
 }
 this.onEnterFrame = function() {
  var cur = 0;
  var max = 0;
  var scalable = true;
  for (var i = 0; i<thumb.length; i++) {
   var c = thumb*.img.getBytesLoaded();
   var m = thumb*.img.getBytesTotal();
   if (c>10) {
    cur += c;
   }
   if (m>10) {
    max += m;
   } else {
    if (getTimer()-thumb*.stime<3000) {
     // image timeout
     scalable = false;
    }
   }
  }
  if (cur>10 && scalable == true) {
   var percent = cur*100/max;
   loader.setPerc(percent);
   if (percent>=100) {
    arrange(images, big_images);
   }
  }
 };
}
// Creating thumbnail instances
function arrange(arr, big_arr) {
 delete this.onEnterFrame;
 var amt = Math.round(mask._width/(arr.length*distance))+1;
 var count = 0;
 for (var i = 0; i<amt; i++) {
  for (var h = 0; h<arr.length; h++) {
   thumb[count] = container.attachMovie("thumbnail", "thumb"+count, count);
   thumb[count].big_img = big_arr[h];
   thumb[count].img = arr[h];
   thumb[count]._x = int(count*distance);
   count++;
  }
 }
 startWatch();
}
// Moving thumbnails by mouse
function startWatch() {
 left = 0;
 right = thumb.length-1;
 container._visible = true;
 var spd = 0;
 this.onEnterFrame = function() {
  if (mask.hitTest(_parent._xmouse, _parent._ymouse, false)) {
   var dst = mask._width/2-mask._xmouse;
   var sgn = dst/Math.abs(dst);
   var dspd = Math.pow(Math.abs(dst), 1.1)/30*sgn;
   spd += (dspd-spd)/3;
  } else {
   spd /= 1.1;
  }
  for (var i = 0; i<thumb.length; i++) {
   thumb*._x += int(spd);
  }
  if (spd<0) {
   if (thumb[left]._x<-thumb[left]._width) {
    putRight(left);
   }
  } else {
   if (thumb[right]._x>mask._width) {
    putLeft(right);
   }
  }
 };
}
function putRight(n) {
 if (n>0) {
  thumb[n]._x = thumb[n-1]._x+distance;
  left = (left == thumb.length-1) ? 0 : left+1;
 } else {
  thumb[n]._x = thumb[thumb.length-1]._x+distance;
  left++;
 }
 right = n;
}
function putLeft(n) {
 if (n<thumb.length-1) {
  thumb[n]._x = thumb[n+1]._x-distance;
  right = (right == 0) ? thumb.length-1 : right-1;
 } else {
  thumb[n]._x = thumb[0]._x-distance;
  right--;
 }
 left = n;
}

How can I tell the Slider to appear when the swf is loaded?
Offcourse I tried with onLoad and onEnterframe, but nothing works.