hittestobject multiple functions with Drag and drop - actionscript-3

Question

I have troubles making this code functionnal, i am pretty new to coding and learn everyday, so sorry if this question looks stupid.
Here's where I am so far :
a1 is a drag and drop object
a2 is an area, which when a1 is dropped on it, add the value 5 on a textfield
a3 is an area, which when a1 is dropped on it, substract the value 5 on a textfield
a1 start in the a3 area, when I drag a1 to a2, it shows 5, if I drag back to a3, it shows 0, so it's working as intended
Now what I struggle with :
a code that don't add 5 if I move a1 to a2, when a1 is ALREADY on a2.
a code that don't substract 5 if I move a1 to a3, when a1 is ALREADY on a3.
here's my code :
var myTextBox:TextField = new TextField();
var myTextBox2:TextField = new TextField();
addChild(myTextBox2);
myTextBox2.width = 200;
myTextBox2.height = 100;
myTextBox2.x = 100;
myTextBox2.y = 20;
a1.addEventListener(MouseEvent.MOUSE_DOWN, drag);
stage.addEventListener(MouseEvent.MOUSE_UP, drop);
function drag(e:MouseEvent):void
{
e.target.startDrag();
}
function drop(e:MouseEvent):void
{
stopDrag();
if (a1.hitTestObject(a2))
{
myTextBox.text = "5";
var r:String=String(uint(myTextBox.text)+uint(myTextBox2.text));
myTextBox2.text=r;
}
if (a1.hitTestObject(a3))
{
myTextBox.text = "5";
var r2:String=String(uint(myTextBox2.text)-uint(myTextBox.text));
myTextBox2.text=r2;
}
else
{
trace("No collision.");
}
}
I don't think it's too complicated, but I don't have the knowledge yet to make it work, any assistance would be greatly appreciated ! thanks!

Answer 1

Ok, found out a way, so posting the code in case someone need it, or if someone has a better code, always wanting to learn ! thanks !
Added a movable object named a4 to test on multiple drag and drop objects
var myTextBox:TextField = new TextField();
var myTextBox2:TextField = new TextField();
var myTextBox3:TextField = new TextField();
addChild(myTextBox2);
myTextBox2.width = 200;
myTextBox2.height = 100;
myTextBox2.x = 100;
myTextBox2.y = 20;
a1.addEventListener(MouseEvent.MOUSE_DOWN, drag);
a1.addEventListener(MouseEvent.MOUSE_UP, drop);
a4.addEventListener(MouseEvent.MOUSE_DOWN, drag);
a4.addEventListener(MouseEvent.MOUSE_UP, drop);
function drag(e:MouseEvent):void
{
if (e.target.hitTestObject(a2))
{
e.target.startDrag();
myTextBox.text = "0";
myTextBox3.text = "5";
}
if (e.target.hitTestObject(a3))
{
e.target.startDrag();
myTextBox.text = "5";
myTextBox3.text = "0";
}
}
function drop(e:MouseEvent):void
{
stopDrag();
if (e.target.hitTestObject(a2))
{
var r:String=String(uint(myTextBox.text)+uint(myTextBox2.text));
myTextBox2.text=r;
}
if (e.target.hitTestObject(a3))
{
var r2:String=String(uint(myTextBox2.text)-uint(myTextBox3.text));
myTextBox2.text=r2;
}
}