Fade in a picture

Hi,

I would like my picture to fade in, how do I do it?

I load my image like this:
var imageFolder:String = “main_pictures/”;
var imageArray:Array = [imageFolder + “picture.png”];
//Container
var imagecontainer:Sprite = new Sprite();

//Loop through the image array and load:
for (var imageassets = 0; imageassets < imageArray.length; imageassets++)
{
var mypicrequest:URLRequest = new URLRequest(imageArray[imageassets]);
var mylineloader:Loader = new Loader();

mylineloader.load(mypicrequest);
//add to display list
imagecontainer.addChild(mylineloader);
addChild(imagecontainer);

}
imagecontainer.x = 220;
imagecontainer.y = 60;

Thanks for help!
k.