AS3 Drag and Drop multiple objects - improving code suggestion

Hi, i want to improve my code for drag drop
seven different or multiple objects to be moved in any three of target places
then target value will be search by category or feature wise,

any suggestion will be welcome in helping writing the code.
this drag n drop code work but i want to improve it, pls guide thks

Quote:

---

//--------------------------------
//---------------Romantic--------------
//--------------------------------
romantic.addEventListener(MouseEvent.MOUSE_DOWN, romantic_pick);
romantic.addEventListener(MouseEvent.MOUSE_UP, romantic_drop);
romantic.buttonMode = true;
//---functions
//--------------------------------
//--------------------------------
function romantic_pick(event:MouseEvent):void {
romantic.startDrag(true);
if(romantic.x > 894 && romantic.x < 989 && romantic.y > 97 && romantic.y < 229)
{
msg.text = "";
}}
//--------------------------------
//--------------------------------
//--------------------------------
function romantic_drop(event:MouseEvent):void {
romantic.stopDrag();
boxone_romantic();

}
//------------------------------------
//--------------------------------
//--------------------------------
//--------------------------------
function smallsize_romantic()
{
romantic.width = 50;
romantic.height = 75;
}
//--------------------------------
//--------------------------------
//--------------------------------

function boxposition1_romantic()
{ romantic.x =540;
romantic.y =225;
msg1.text = "Romantic";
option= 1;
romantic.rotation=-9.3;
romantic.removeEventListener(MouseEvent.MOUSE_DOWN , romantic_pick);
romantic.removeEventListener(MouseEvent.MOUSE_UP, romantic_drop);
romantic.buttonMode = false;
}
//--------------------------------
//--------------------------------
//--------------------------------
function boxposition2_romantic()
{ romantic.x =550;
romantic.y =300;
msg2.text = "Romantic";
option=2;
romantic.rotation=-9.3;
romantic.removeEventListener(MouseEvent.MOUSE_DOWN , romantic_pick);
romantic.removeEventListener(MouseEvent.MOUSE_UP, romantic_drop);
romantic.buttonMode = false;

}
//--------------------------------
//--------------------------------
//--------------------------------
function boxposition3_romantic()
{ romantic.x =560;
romantic.y =365;
msg3.text = "Romantic";
option=3;
romantic.rotation=-9.3;
romantic.removeEventListener(MouseEvent.MOUSE_DOWN , romantic_pick);
romantic.removeEventListener(MouseEvent.MOUSE_UP, romantic_drop);
romantic.buttonMode = false;

}
//--------------------------------
//---------------------

---

after going through many googling... i recode as below
but giving error, though code working fine
----------------------
"TypeError: Error #1009: Cannot access a property or method of a null object reference.
at myweekend_test04_fla::MainTimeline/step2()"
--------------------------

Quote:

---

stop();
var stamps:Array = ["spa", "romantic", "beach"];
var startpoint:Point = new Point();
//------------------------------------
//--------------function--------------
function pickUp(event:MouseEvent):void {
event.target.startDrag(true);
event.target.rotation=0;
startpoint.x = event.target.x;
startpoint.y = event.target.y;

//x,y starting point
position1.text = event.target.name +"\n"+"x:"+startpoint.x +", y:"+startpoint.y;
}

function dropIt(event:MouseEvent):void {
event.target.stopDrag();
if (event.target.dropTarget != null && event.target.dropTarget.parent == box1){
msg1.text = event.target.name;
event.target.rotation=-9.3;
event.target.scaleX=0.8;
event.target.scaleY=0.8;
event.target.removeEventListener(MouseEvent.MOUSE_ DOWN, pickUp);
event.target.removeEventListener(MouseEvent.MOUSE_ UP, dropIt);
event.target.buttonMode = false;


} else {
if (event.target.dropTarget != null && event.target.dropTarget.parent == box2){
msg2.text = event.target.name;
event.target.rotation=-9.3;
event.target.scaleX=0.8;
event.target.scaleY=0.8;
event.target.removeEventListener(MouseEvent.MOUSE_ DOWN, pickUp);
event.target.removeEventListener(MouseEvent.MOUSE_ UP, dropIt);
event.target.buttonMode = false;

} else {
if (event.target.dropTarget != null && event.target.dropTarget.parent == box3){
msg3.text = event.target.name;
event.target.rotation=-9.3;
event.target.scaleX=0.8;
event.target.scaleY=0.8;
event.target.removeEventListener(MouseEvent.MOUSE_ DOWN, pickUp);
event.target.removeEventListener(MouseEvent.MOUSE_ UP, dropIt);
event.target.buttonMode = false;
}

else{
event.target.x = startpoint.x;
event.target.y = startpoint.y;}

} }
//x,y starting point
position2.text = event.target.name +"\n"+"x:"+startpoint.x +", y:"+startpoint.y;
}

//------------------------------------
//------------------------------------
spa.buttonMode = true;
romantic.buttonMode = true;
beach.buttonMode = true;
//---------------------------
spa.addEventListener(MouseEvent.MOUSE_DOWN, pickUp);
spa.addEventListener(MouseEvent.MOUSE_UP, dropIt);
//---------------------------
romantic.addEventListener(MouseEvent.MOUSE_DOWN, pickUp);
romantic.addEventListener(MouseEvent.MOUSE_UP, dropIt);
//-------------------------------------------------
beach.addEventListener(MouseEvent.MOUSE_DOWN, pickUp);
beach.addEventListener(MouseEvent.MOUSE_UP, dropIt);
//------------------------------------
//------------------------------------
btn_press.buttonMode = true;
btn_press.addEventListener(MouseEvent.CLICK, reset);
function reset(event:MouseEvent):void {
gotoAndStop("reset");
}

btn_submit.addEventListener(MouseEvent.CLICK, step2);
function step2(event:MouseEvent):void {

for (var i=0; i<stamps.length ;i++)
{
if(msg1.text == stamps[i] && msg2.text == stamps[i] && msg3.text == stamps[i]){
gotoAndStop(stamps[i]);
}
else{
if(msg2.text == stamps[i]){
gotoAndStop(stamps[i]);
}
else{
if(msg3.text == stamps[i]){
gotoAndStop(stamps[i]);
}}}}
}

---

Useful links

Drag and Drop
http://livedocs.adobe.com/flash/9.0/...operators.html
http://monkeyflash.com/tutorials/flash-drag-and-drop/
http://livedocs.adobe.com/flash/9.0/...ay/Sprite.html
http://www.aorchard.com/content/poin...ial-flash-as30


Inventory system
http://www.freeactionscript.com/2008...ory-system-v2/

Snap to location
http://www.flashandmath.com/basic/dr.../dd_tour5.html
http://friendsofed.infopop.net/4/Ope...5&m=9481028771

Event Objects
http://www.learningactionscript3.com...-event-object/

Dnamic Slides
http://aswebcreations.com/?p=244

Array
http://www.onebyonedesign.com/tutorials/array_methods/
http://www.kirupa.com/forum/showthread.php?t=342037
http://www.flashconf.com/actionscrip...ctionscript-3/

XML
http://blog.six4rty.ch/tutorials/fla...-xml-with-as3/
http://yuji.wordpress.com/2008/05/14...ariable-names/
http://www.republicofcode.com/tutorials/flash/as3xml/
http://willperone.net/Code/as3xml.php

Thanks for linking to my AS2 inventory system letschillout.

I just wanted to share a link to my AS3 version here:
http://www.freeactionscript.com/2010...entory-system/

Thanks again!