Right-Click Context Menu

var menu:ContextMenu = new ContextMenu();
menu.hideBuiltInItems();
var menuItem:ContextMenuItem = new ContextMenuItem("Go to google");
menuItem.addEventListener(ContextMenuEvent.MENU_ITEM_SELECT, goToContextMenu); 
menu.customItems.push(menuItem);
this.contextMenu = menu;

function goToContextMenu(event:ContextMenuEvent):void {
   var link:URLRequest = new URLRequest("http://www.google.com");
   navigateToURL(link,"_blank");
}

Center A Display Object

centerObject(obj); //Centers a display object

function centerObject(obj:DisplayObject):void {
 obj.x = stage.stageWidth / 2 - obj.width / 2;
 obj.y = stage.stageHeight / 2 - obj.height / 2;
}

Draw A Triangle

var triangle:Shape; 

drawTriangle(0, 10, 100, 0xFF0000);

function drawTriangle(x:Number, y:Number, height:Number, color:uint){
  triangle = new Shape; 
  triangle.graphics.beginFill(color);
  triangle.graphics.moveTo(height/2, y);
  triangle.graphics.lineTo(height, height+y);
  triangle.graphics.lineTo(x, height+y);
  triangle.graphics.lineTo(height/2, y);
  addChild(triangle);  
}