问从数组创建变量actionscript 3

EN

//right here, i need to make a variable that I can put in the "addchild" so that
//for every one of the list items clicked, it adds a movieclip child with
//the same name (such as menu_bag_mc from above) with "_frame" appended.
//I tried the next line out, but it doesn't really work.
var framevar:MovieClip = menuList[i] += "_frame";

function createContent(event:MouseEvent):void {
    if(MovieClip(root).currentFrame == 850) {
    while(MovieClip(root).numChildren > 1)
    {
        MovieClip(root).removeChild(MovieClip(root).getChildAt(MovieClip(root).numChildren - 1));
    }
//Here is where the variable would go, to add a child directly related
//to whichever array item was clicked (here, "framevar")
MovieClip(root).addChild (framevar);
MovieClip(root).addChild (closeBtn);
}
else {
MovieClip(root).addChild (framevar);
MovieClip(root).addChild (closeBtn);
MovieClip(root).gotoAndPlay(806);
}
}