Loading an image from the library and assigning it a url

//Custom Class file code
 
package { 
 
	import flash.display.Sprite; 
 
	public class  CustomObject extends Sprite { 
 
 
		private var _link:String; 
 
		public function CustomObject(link:String):void {
 
			_link = link; 
 
			var box:Box = new Box() // Box is the linkage id name from the box movieclip in the library
			addChild(box)
		} 
 
		public function get link():String { return _link; } 
 
		public function set link(value:String):void {
			_link = value;
		} 
	}
}
 
//-------------------------------------------------------------------------------------------------
 
//Document Class file
 
package { 
 
	import flash.display.*;
	import flash.events.*; 
	import flash.net.*;
 
	public class CustomObjectTest extends Sprite { 
 
		public function CustomObjectTest():void {
			var links:Array = new Array("link1.html","link2.html","link3.html","link4.html") 
			for (var n:Number=0; n<4; n++){	
			var co:CustomObject = new CustomObject(links[n]);
			co.addEventListener(MouseEvent.CLICK, onClick);
			addChild(co);
			co.y = 100*n;
			}
		} 
 
		private function onClick(me:MouseEvent):void {
 
			var siteLink:URLRequest = new URLRequest( me.currentTarget.link );
				navigateToURL( siteLink ); 
		}
	}
}