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A quick lookup for the ActionScript to perform various common Flash tasks, with references to pages at the site for further reading. Code is written assuming the movieclips being addressed are in the main timeline, and the code is in one main frame (either frame 1 or another frame with a stop action in it) of the main timeline.

play_mc.onRelease = function() {
   plane_mc.play();
};

function flyPlane() {
   if (plane_mc._currentframe == 1) {
      plane_mc.play();
   }
}
play_mc.onRelease = flyPlane;

var found:Boolean = false;

function unhide() {
   this.associatedClip._visible = true;
}
c0.associatedClip = box0;
c0.onRelease = unhide;

var controlInfo:Array = [
   "wake up", 
   "eat lunch", 
   "go home", 
   "walk the dog"
   ];
function showText() {
   page_txt.text = this.mytext;
}
for (var i=0; i < 5; i++) {
   this["c"+i].mytext = controlInfo[i];
   this["c"+i].onRelease = showText;
}

var cInfo:Array = [
   {ctl:"wakeup_mc", text:"wake up", pic:"alarm_mc"},
   {ctl:"eatlunch_mc", text:"eat lunch", pic:"lunch_mc"},
   {ctl:"gohome_mc", text:"go home", pic:"door_mc"},
   {ctl:"walkdog_mc", text:"walk the dog", pic:"dog_mc"},
   {ctl:"sleep_mc", text:"fall asleep", pic:"bed_mc"}
   ];
function onClick() {
   page_txt.text = this.mytext;
   this.myclip._alpha = 50;
}
for (var i=0; i < cInfo.length; i++) {
   this[cInfo[i].ctl].mytext = cInfo[i].text;
   this[cInfo[i].ctl].myclip = frame_mc[cInfo[i].pic];
   this[cInfo[i].ctl].onRelease = onClick;
}

var xspeed:Number = 5;
var leftbound:Number = 0;
var rightbound:Number = 300;

function moveRightLeft() {
   this._x += xspeed;
   if (this._x > rightbound - this._width) {
      this._x = rightbound - this._width;
      xspeed *= -1;
   } else if (this._x < leftbound) {
      this._x = leftbound;
      xspeed *= -1;
   }
}

ball.onEnterFrame = moveRightLeft;

var bounds:Object = {L:0, T:0, R:300, B:200};
var xspeed:Number = 5;
var yspeed:Number = 5;

function moveInBounds() {
   this._x += xspeed;
   this._y += yspeed;
   if (this._x > bounds.R - this._width) {
      this._x = bounds.R - this._width;
      xspeed = -xspeed;
   } else if (this._x < bounds.L) {
      this._x = bounds.L;
      xspeed = -xspeed;
   } else if (this._y > bounds.B - this._height) {
      this._y = bounds.B - this._height;
      yspeed = -yspeed;
   } else if (this._y < bounds.T) {
      this._y = bounds.T;
      yspeed = -yspeed;
   }
}

ball.onEnterFrame = moveInBounds;

dragger_mc.onRelease = 
dragger_mc.onReleaseOutside = function() {
   this.stopDrag();
};

var loader:MovieClipLoader = new MovieClipLoader();
function onLoadProgress(_mc, loaded, total) {
   var pct:Number = Math.round(loaded / total * 100);
   bar_mc._xscale = pct;
};
function onLoadInit(_mc) {
   bar_mc._visible = false;
   _mc._xscale = _mc._yscale = 50;
   _mc._visible = true;
};
loader.addListener(this);
bar_mc._xscale = 0;
holder_mc._visible = false;
loader.loadClip("somepic.jpg", holder_mc);

var loader:MovieClipLoader = new MovieClipLoader();
var lis:Object = {};
lis.onLoadProgress = function(_mc, loaded, total) {
   var pct:Number = Math.round(loaded / total * 100);
   preloader_mc.gotoAndStop(pct);
};
lis.onLoadInit = function(_mc) {
   preloader_mc._visible = false;
   _mc.play();
};
loader.addListener(lis);
loader.loadClip("movie.swf", player_mc);

var lv:LoadVars = new LoadVars();

lv.onData = function(thetext:String) {
   page_txt.text = thetext;
}

lv.load("thetextfile.txt");  

var lv:LoadVars = new LoadVars();
var paintcolors:Array = [];

function setcolors() {
   var c:Color;
   for (var i=0; i < paintcolors.length; i++) {
      c = new Color(this["swatch"+i].dot);
      c.setRGB(paintcolors[i].mycolor);
      this["swatch"+i].name.text = paintcolors[i].myname;
   }
}

lv.onLoad = function(success:Boolean) {
   if (success) {
      var i:Number=0;
      while (this["name"+i]!=undefined) {
         paintcolors.push({ 
            myname:this["name"+i], 
            mycolor:parseInt(this["val"+i], 16)
         });
         i++;
      }
      setcolors();
   } else {
      trace('problem reading file');
   }
};

lv.load("paintcolors.txt");