flash - Cannot unload previous swf while loading the new ones -

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i have made main navigation page in adobe flash , 3 buttons in it. have used code in order call external swf's according button pressed. problem when press button load 1 swf want previous 1 unloaded. how can have tried everything

var myloader:loader = new loader();         var myloadermain:urlrequest = new urlrequest("main1.swf"); var myloaderquiz:urlrequest = new urlrequest("quiz.swf"); var myloaderanimation:urlrequest = new urlrequest("athens_animation.swf"); var myloadervideo:urlrequest = new urlrequest("videogallery.swf");   videogallerybtn.addeventlistener(mouseevent.click, videofunc);  function videofunc(curevt:mouseevent) { myloader.load(myloadervideo); addchild(myloader);   }   quizbtn.addeventlistener(mouseevent.click, quizfunc);  function quizfunc(curevt:mouseevent) { myloader.load(myloaderquiz); addchild(myloader);   }   animationbtn.addeventlistener(mouseevent.click, animationfunc);   function animationfunc(curevt:mouseevent) { myloader.load(myloaderanimation); addchild(myloader);  }

have 2 event listeners each button, first mouse_down unload loader , mouse_up load loader .

    videogallerybtn.addeventlistener(mouseevent.mouse_down, mousedown);     videogallerybtn.addeventlistener(mouseevent.mouse_up, mouseup);       function mousedown(curevt:mouseevent) {      trace("mousedown unload, remove");      }       function mouseup(curevt:mouseevent) {      trace("mouseup load , add it");      }

hopefully principle.


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