Ordering images with xml tags?

Hi,

I have a Flash/XML image gallery that works fine, and you click through and it goes down the images until they’re finished. The only problem is that now I want to be able to set the order the images show up in my xml. I’ve set a new tag, called ‘position’ and referenced it, but I don’t know how to set the actions on my ‘previous’ and ‘next’ image buttons to read the number from the xml and display the correct image, any ideas?

Heres the code-

_global.myTimeline = this;

function loadXML(loaded) {
    if (loaded) {
        xmlNode = this.firstChild;
        image = [];
        description = [];
        position = [];
        total = xmlNode.childNodes.length;
        for (i=0; i<total; i++) {
            image* = xmlNode.childNodes*.childNodes[0].firstChild.nodeValue;
            description* = xmlNode.childNodes*.childNodes[1].firstChild.nodeValue;
            position* = xmlNode.childNodes*.childNodes[2].firstChild.nodeValue;
        }
        firstImage();
    } else {
        content = "file not loaded!";
    }
}
xmlData = new XML();
xmlData.ignoreWhite = true;
xmlData.onLoad = loadXML;
xmlData.load("images.xml");
/////////////////////////////////////
listen = new Object();
listen.onKeyDown = function() {
    if (Key.getCode() == Key.LEFT) {
        prevImage();
    } else if (Key.getCode() == Key.RIGHT) {
        nextImage();
    }
};
Key.addListener(listen);
previous_btn.onRelease = function() {
    prevImage();
};
next_btn.onRelease = function() {
    nextImage();
};
/////////////////////////////////////
p = 0;
this.onEnterFrame = function() {
    filesize = picture.getBytesTotal();
    loaded = picture.getBytesLoaded();
    preloader._visible = true;
    if (loaded != filesize) {
        preloader.preload_bar._xscale = 100*loaded/filesize;
    } else {
        preloader._visible = false;
        if (picture._alpha<100) {
            picture._alpha += 10;
        }
    }
};
function nextImage() {
    if (p<(total-1)) {
        p++;
        if (loaded == filesize) {
            picture._alpha = 0;
            picture.loadMovie(image[p], 1);
            desc_txt.text = description[p];
            pos_txt.text = position[p];
            picture_num();
        }
    }
}
function prevImage() {
    if (p> 0) {
        p--;
        picture._alpha = 0;
        picture.loadMovie(image[p], 1);
        desc_txt.text = description[p];
        pos_txt.text = position[p];
        picture_num();
    }
}
function firstImage() {
    if (loaded == filesize) {
        picture._alpha = 0;
        picture.loadMovie(image[0], 1);
        desc_txt.text = description[0];
        pos_txt.text = position[0];
        picture_num();
    }
}
function picture_num() {
    current_pos = position[p];
    pos_txt.text = current_pos+" / "+total;
}

Thanks!
Tom