How to parse RSS Feed - Different URL for each button

I'm making an app with AS3 and I want to be able to load a different RSS Feed when the user clicks on each button. This is the code I have so far, has anyone any idea how I can modify my code to do this?

here's my code so far:

//IMPORT CLASSES

import fl.controls.List;

import flash.net.URLLoader;

import flash.events.Event;

import flash.net.URLRequest;

cGOSSIP.addEventListener(MouseEvent.CLICK, doClick);

function doClick (e:MouseEvent):void

{

cGOSSIP.gotoAndStop ("GOSSIP"); 

}

wNEWS.addEventListener(MouseEvent.CLICK, doClick2);

function doClick2 (e: MouseEvent):void

{

          wNEWS.gotoAndStop ("WORLD NEWS");

}

eNEWS.addEventListener(MouseEvent.CLICK, doClick3);

function doClick3 (e: MouseEvent):void

{

          eNEWS.gotoAndStop ("ENT NEWS");

}

fbNEWS.addEventListener(MouseEvent.CLICK, doClick4);

function doClick4 (e: MouseEvent):void

{

          fbNEWS.gotoAndStop ("FB NEWS");

}

//NEWSLIST FORMATTING

var newsListTf:TextFormat = new TextFormat();

newsListTf.font = "Verdana";

newsListTf.color = 0xFFFFFF;

newsListTf.size = 18;

newsListTf.align = "left";

newsList.setRendererStyle("textFormat", newsListTf);

newsList.rowHeight = 100;

newsList.allowMultipleSelection = false;

//newsList.wordWrap = true;

//NEWSDISPLAY TEXT AREA FORMATTING

var rssStoryTf:TextFormat = new TextFormat();

rssStoryTf.font = "Verdana";

rssStoryTf.color = 0x6699CC;

rssStoryTf.size = 22;

rssStoryTf.align = "left";

rssStory.setStyle("textFormat", rssStoryTf);

//READMORE BUTTON FORMATTING

var buttonTf:TextFormat = new TextFormat();

buttonTf.font = "Verdana";

buttonTf.color = 0xFFFFFF;

buttonTf.size = 22;

btn_ReadMore.setStyle("textFormat", buttonTf);

//RSS FEED

var rssLoader:URLLoader = new URLLoader();

var rssURL:URLRequest = new URLRequest

("http://rssfeeds.tv.adobe.com/adobe-higher-education-solutions.xml");

rssLoader.addEventListener(Event.COMPLETE, rssLoaded);

newsList.addEventListener(Event.CHANGE, selectRssStory);

btn_ReadMore.addEventListener(MouseEvent.CLICK, goToURL);

rssLoader.load(rssURL);

var newsXML:XML = new XML();

var currentStoryURL:URLRequest = new URLRequest();

newsXML.ignoreWhitespace = true;

function rssLoaded(evt:Event):void

{

newsXML = new XML(rssLoader.data);

//trace(newsXML);

for(var item:String in newsXML.channel.item) {

//newsList.addItem({label: newsXML.channel.item[item].pubDate.substr(0, 16)

//+": " + newsXML.channel.item[item].title } );

newsList.addItem({label: newsXML.channel.item[item].title.substr(0, 40)

+" ..." } );

}

newsList.selectedIndex = 0;

//FIRST LOAD

currentStoryURL = new URLRequest(newsXML.channel.item[0].link);

rssStory.htmlText = newsXML.channel.item[0].description;

}

function selectRssStory(evt:Event):void

{

rssStory.htmlText = newsXML.channel.item[evt.target.selectedIndex ].description;

currentStoryURL = new URLRequest(newsXML.channel.item[evt.target.selectedIndex

].link);

}

function goToURL(event:MouseEvent):void

{

navigateToURL(currentStoryURL);

}