Not getting how to load XML elements onRollover ...

This should be easy however i am not getting it...

I have five movie clips, for example, mc1, mc2, mc3, mc4, mc5. onRollover i want it to fetch content from XML and display in toolTipMC movie clip (toolTipMC.img.imgHolder, toolTipMC.title, toolTipMC.detail). Also how to unload when i rollout?

and my XML file:-

<movieclips>
<movieclip image="images/mc1.jpg" title="MC1" detail="This is MC1"></movieclip>
<movieclip image="images/mc2.jpg" title="MC2" detail="This is MC2"></movieclip>
<movieclip image="images/mc3.jpg" title="MC3" detail="This is MC3"></movieclip>
<movieclip image="images/mc4.jpg" title="MC4" detail="This is MC4"></movieclip>
<movieclip image="images/mc5.jpg" title="MC5" detail="This is MC5"></movieclip>
</movieclips>

Actionscript :-

mc = mainMap.map.pan;
toolTipMC._visible = false;
detailMC._visible = false;
detailMC.detail.autoSize = true;
for (i in mc) {
if (typeof (mc[i]) == "movieclip" && i != "click") {
myBtn = mc[i];
myBtn._alpha = 0;
this.useHandCursor = false;
myBtn.txt = titles[j];
myBtn.txt2 = detials[j];
myBtn.img = images[j].img;

var x:XML = new XML();
x.ignoreWhite = true;

var images:Array = new Array();
var titles:Array = new Array();
var details:Array = new Array();

x.onLoad = function(success) {
var photos:Array = this.firstChild.childNodes;
for(j=0;j<photos.length;j++) {
images.push(photos[j].attributes.url);
titles.push(photos[j].attributes.title);
detials.push(photos[j].attributes.detail);
}
whoIsOn = i;
}

x.load("data.xml");

myBtn.onRollOver = function() {
if (miniMap._visible) {
this.useHandCursor = false;
var point = {x: (this.mouseX ), y: (this.mouseY)};
this.localToGlobal(point);
toolTipMC._x = point.x;
toolTipMC._y = point.y;

toolTipMC._visible = true;

toolTipMC.img.imgHolder.loadMovie(this.img);
toolTipMC.tip.text = this.txt;
toolTipMC.detail.text = this.txt2;
}else{
this.useHandCursor = false;
}

};

myBtn.onRollOut = function() {
toolTipMC._visible = false;
};
myBtn.onPress = function() {
if (miniMap._visible) {
toolTipMC._visible = true;
slider.setValue(100);
PanMapCenterTo(this._x - (baseSize.width / 4) + this._width, this._y - (baseSize.height / 4) + this._height);
}
};

};
}