Linking multiple objects to one coding name - actionscript-3

Question

I am trying to make an rpg style game in Flash AS3. I am trying to get my character to stop when he hits objects such as trees and buildings. Is there a way I can link multiple objects together and make the code say something like 'take object1, object2, and object3 and name it multipleobjects'? I have the code set up so that the character stops at one tree but I'm not positive how/if you can combine objects so that he won't go through multiple at one time. Thank you very very much in advanced!
Objects:
manmc (my character), treer1_MC (the first tree) treer2_MC (second tree) and so on
import flash.events.KeyboardEvent;
import flash.ui.Keyboard;
import flash.display.MovieClip;
import flash.events.Event;
import flash.display.Stage;
manmc.gotoAndStop ("Stand Front Frame");
var rightPressed:Boolean = new Boolean(false);
var leftPressed:Boolean = new Boolean(false);
var upPressed:Boolean = new Boolean(false);
var downPressed:Boolean = new Boolean(false);
var manSpeed:Number = 3;
stage.addEventListener(KeyboardEvent.KEY_DOWN, keyDownHandler);
stage.addEventListener(KeyboardEvent.KEY_UP, keyUpHandler);
stage.addEventListener(Event.ENTER_FRAME, gameLoop);
function keyDownHandler (keyEvent:KeyboardEvent):void
{
if(keyEvent.keyCode == Keyboard.RIGHT)
{
rightPressed = true;
}
else if(keyEvent.keyCode == Keyboard.LEFT)
{
leftPressed = true;
}
else if(keyEvent.keyCode == Keyboard.UP)
{
upPressed = true;
}
else if(keyEvent.keyCode == Keyboard.DOWN)
{
downPressed = true;
}
}
function keyUpHandler (keyEvent:KeyboardEvent):void
{
if(keyEvent.keyCode == Keyboard.RIGHT)
{
rightPressed = false;
manmc.gotoAndStop("Stand Right Frame");
}
else if(keyEvent.keyCode == Keyboard.LEFT)
{
leftPressed = false;
manmc.gotoAndStop("Stand Left Frame");
}
else if(keyEvent.keyCode == Keyboard.UP)
{
upPressed = false;
manmc.gotoAndStop("Stand Back Frame");
}
else if(keyEvent.keyCode == Keyboard.DOWN)
{
downPressed = false;
manmc.gotoAndStop("Stand Front Frame");
}
}
function gameLoop(loopEvent:Event):void
{
if(rightPressed)
{
if(manmc.x < 1050)
{
manmc.x += manSpeed;
}
manmc.gotoAndStop("Walk Right Frame");
if (manmc.hitTestObject(treer1_MC))
{
trace("leftHit");
manmc.x -= 3;
}
}
else if(leftPressed)
{
if (manmc.x > 145)
{
manmc.x -= manSpeed;
}
manmc.gotoAndStop("Walk Left Frame");
if (manmc.hitTestObject(treer1_MC))
{
trace("rightHit");
manmc.x += 3;
}
}
else if(downPressed)
{
if(manmc.y < 780)
{
manmc.y += manSpeed;
}
manmc.gotoAndStop("Walk Front Frame");
if (manmc.hitTestObject(treer1_MC))
{
trace("downHit");
manmc.y -= 3;
}
}
else if(upPressed)
{
if(manmc.y > 145)
{
manmc.y -= manSpeed;
}
manmc.gotoAndStop("Walk Back Frame");
if (manmc.hitTestObject(treer1_MC))
{
trace("upHit");
manmc.y += 3;
}
}
}

Answer 1

Use an array to keep track of multiple objects.
Instead of manipulating the single object, you then use a loop to iterate over all the elements in the array which are the single objects.