Unload and stop question

Question

I need to use the unload and stop method.  But  my actionscript code calls individual swf files which contain 1 video player  each. How would I add the unloadandstop methods into the  existing actionscript?
First question, add this code to the main.swf that is calling the swfs with thre players correct?
So far I would I add a second set of event listeners for this function, like this?
home.addEventListener("click",afterClick);
bio.addEventListener("click",afterClick);
commercial.addEventListener("click",afterClick);
films.addEventListener("click",afterClick);
videomontage.addEventListener("click",afterClick);
contact.addEventListener("click",afterClick);
function afterClick(e:MouseEvent):void
   unloadAndStop(what goes here?);
if so write separate functions for each swf being called? or call the same code
the variable remove child calls below?
("swfs/" + event.target.name + ".swf");
EXISTING CODE
var Xpos:Number = 0;
var Ypos:Number = 0;
var swf:MovieClip;
var loader:Loader = new Loader();
var defaultSWF:URLRequest = new URLRequest("swfs/home.swf");
loader.load(defaultSWF);
loader.x = Xpos;
loader.y = Ypos;
addChild(loader);
// Btns Universal function
function btnClick(event:MouseEvent):void {
    removeChild(loader);
    var newSWFRequest:URLRequest = new URLRequest("swfs/" + event.target.name + ".swf");
    loader.load(newSWFRequest);
    loader.x = Xpos;
    loader.y = Ypos;
    addChild(loader);
// Btn listeners
home.addEventListener(MouseEvent.CLICK, btnClick);
bio.addEventListener(MouseEvent.CLICK, btnClick);
commercial.addEventListener(MouseEvent.CLICK, btnClick);
films.addEventListener(MouseEvent.CLICK, btnClick);
videomontage.addEventListener(MouseEvent.CLICK, btnClick);
contact.addEventListener(MouseEvent.CLICK, btnClick);

Answer 1

var Xpos:Number = 0;
var Ypos:Number = 0;
var swf:MovieClip;
var loader:Loader = new Loader();
var defaultSWF:URLRequest = new URLRequest("swfs/home.swf");
loader.load(defaultSWF);
loader.x = Xpos;
loader.y = Ypos;
addChild(loader);
// Btns Universal function
function btnClick(event:MouseEvent):void {
    if(loader.content){
loader.unloadAndStop();
   removeChild(loader);
    var newSWFRequest:URLRequest = new URLRequest("swfs/" + event.target.name + ".swf");
    loader.load(newSWFRequest);
    loader.x = Xpos;
    loader.y = Ypos;
    addChild(loader);
// Btn listeners
home.addEventListener(MouseEvent.CLICK, btnClick);
bio.addEventListener(MouseEvent.CLICK, btnClick);
commercial.addEventListener(MouseEvent.CLICK, btnClick);
films.addEventListener(MouseEvent.CLICK, btnClick);
videomontage.addEventListener(MouseEvent.CLICK, btnClick);
contact.addEventListener(MouseEvent.CLICK, btnClick);