Can you reference a variable by string concatenation?

I want to reuse these two functions for about 10 items that need to be dragged and dropped.
I need to reference 10 Boolean variables on the main timeline by building strings in the functions to make up the Boolean names so I can reuse the functions.
Am I making since? Check the coded in red.
www.dev.wisc-online.com/prototypes/DD.zip
Fla is above
[AS]
stop()
var startX:Number;
var startY:Number;
var counter:Number = 0;
hip_mc.addEventListener(MouseEvent.MOUSE_DOWN, pickUp);
hip_mc.addEventListener(MouseEvent.MOUSE_UP, dropIt);
function pickUp(event:MouseEvent):void {
event.target.startDrag(true);
reply_txt.text = “”;
event.target.parent.addChild(event.target);
startX = event.target.x;
startY = event.target.y;
}
function dropIt(event:MouseEvent):void {
event.target.stopDrag();
var myTargetName:String = “target” + event.target.name;
var myTarget:DisplayObject = getChildByName(myTargetName);
if (event.target.dropTarget != null && event.target.dropTarget.parent == myTarget){
reply_txt.text = “Good Job!”;
event.target.removeEventListener(MouseEvent.MOUSE_DOWN, pickUp);
event.target.removeEventListener(MouseEvent.MOUSE_UP, dropIt);
event.target.buttonMode = false;
//event.target.x = myTarget.x;
//event.target.y = myTarget.y;
this[event.target.name].visible = false
this[“target”+ event.target.name].alpha = 100;

this[“Dp”+ event.target.name] = true
[COLOR=“red”]
//DpHip_mc is a boolean variable not a MC
//need to make this code below dynamic not hard coded
MovieClip(root).DpHip_mc = this[“Dp”+ event.target.name]
//how would i refrence this variable like this…
MovieClip(root)[“Dp”+ event.target.name] = this[“Dp”+ event.target.name]
// event.target.name = DpHip_mc

[/COLOR]
counter++;
} else {
reply_txt.text = “Try Again!”;
event.target.x = startX;
event.target.y = startY;
}
if(counter == 4){
reply_txt.text = “Congrats, you’re finished!”;
}
}

[/AS]