Identification of objects in Flash Builder 4

Question

I have a very simple question, but I do not know how to do that i can handle in AS script object identifier.

For example, I have a few pictures:

<mx:Image x="125" y="262" source="card/1.jpg" width="98" height="165" id="card1"/>
<mx:Image x="247" y="262" source="card/1.jpg" width="98" height="165" id="card2"/>
<mx:Image x="379" y="262" source="card/1.jpg" width="98" height="165" id="card3"/>

I need to give them a variety of sources taken from the array:

card1.source = "http://***/gallery/7/"+String(arrayOfNumber[0])+".jpg";
card2.source = "http://***/gallery/7/"+String(arrayOfNumber[1])+".jpg";
card3.source = "http://***/gallery/7/"+String(arrayOfNumber[2])+".jpg";

But this is the wrong decision and need the cycle:

for (var i:uint=0; i<=arrayOfNumber.lenght; i++){
card[i].source = "http://***/gallery/7/"+String(arrayOfNumber[i])+".jpg";
}

But that i must use instead of card[i]?