Transition Help please

programming flash
1

I have this actionscript which works perfectly for a little xml gallery. But What I am trying to do is get a simple alpha transition to work when you select another picture. I have been beating my head against a wall for hours now and need some help.

Can anyone give me a hand

Thanks


myXML = new XML();
myXML.ignoreWhite = true;
myXML.onLoad = function(ok) {
	if (ok) {
		//process data
		allGalleryData = this.firstChild.childNodes;
		imgcnt = 0;
		for (i=0; i<allGalleryData.length; i++) {
			newPiece = container_container.container.content.attachMovie('template', 'piece'+i, i);
			newPiece._y = i*newPiece._height;
			//Text Loading
			trace(allGalleryData*.firstChild.nextSibling.nextSibling.firstChild);
			newPiece.heading_txt.text = allGalleryData*.firstChild.firstChild;
			newPiece.task_txt.text = allGalleryData*.firstChild.nextSibling.firstChild;
			newPiece.desc_txt.text = allGalleryData*.firstChild.nextSibling.nextSibling.nextSibling.firstChild;
			newPiece.load_btn.imageName = allGalleryData*.firstChild.nextSibling.nextSibling.firstChild;
			newPiece.load_btn.inum = i;
			newPiece.load_btn.images = allGalleryData*.firstChild.nextSibling.nextSibling.nextSibling.nextSibling;
			if (newPiece.load_btn.images.childNodes.length>imgcnt) {
				imgcnt = newPiece.load_btn.images.childNodes.length;
			}
			newPiece.holder_mc.loadMovie('portimages/thumbs/'+newPiece.load_btn.imageName);
			newPiece.load_btn.onRelease = function() {
				bigImage_mc.loadMovie('portimages/full/'+this.imageName);
					trace(this);
				// VIEW OF IMAGES FUNCTION
				for (d=1; d<=imgcnt; d++) {
					removeMovieClip('num'+d);
				}
				j = 0;
				for (var aNode = this.images.firstChild; aNode != null; aNode=aNode.nextSibling) {
					j = j+1;
					numbers_mc.newView = attachMovie('numTemplate', 'num'+j, j);
					numbers_mc.newView.image = aNode.firstChild;
					//trace(aNode.firstChild);
					numbers_mc.newView._y = 450;
					numbers_mc.newView.myNum = j;
					numbers_mc.newView.num_txt.text = j;
					numbers_mc.newView._x = (j*numbers_mc.newView._width)+55;
					numbers_mc.newView.onRelease = function() {
						trace(this.image);
						bigImage_mc.loadMovie('portimages/full/'+this.image);
						
					};
				}
			};
		}


//HERE IS THE TRANSITION
		this.bigImage_mc.onEnterFrame = function() {
			
			if (bigImage_mc._alpha<100) {
			bigImage_mc._alpha += 10;
	}
}
	} else {
		trace('what file?');
	}
};
myXML.load('portimages/xml/gallery1.xml');