Fast Forward images from XML file

Hi

Im making a dynamic slideshow webcomic to flip trough a number of pages i update frequently, so im using a XML file and I have everything working quite great but i have a question.

I need to have a button that sends the viewer to the very last (or latest page) or the very first page instead of flipping trough the entyre ammount of pages (it would get annoying if there are like 90 pages)

But i dont know how to set those two buttons.


Here is the actionscript im working with



slides_xml = new XML();
slides_xml.onLoad = startSlideShow;
slides_xml.load("slides.xml");
slides_xml.ignoreWhite = true;
//
// Show the first slide and intialize variables
function startSlideShow(success) {
if (success == true) {
rootNode = slides_xml.firstChild;
totalSlides = rootNode.childNodes.length;
firstSlideNode = rootNode.firstChild;
currentSlideNode = firstSlideNode;
currentIndex = 1;
updateSlide(firstSlideNode);

}
}
//
// Updates the current slide with new image and text
function updateSlide(newSlideNode) {
imagePath = newSlideNode.attributes.jpegURL;
slideText = newSlideNode.firstChild.nodeValue;
loadMovie(imagePath, targetClip);
}
//
// Event handler for 'Next slide' button
next_btn.onRelease = function() {
nextSlideNode = currentSlideNode.nextSibling;
if (nextSlideNode == null) {
break;
} else {
currentIndex++;
updateSlide(nextSlideNode);
currentSlideNode = nextSlideNode;
}
};
//
// Event handler for 'Previous slide' button
back_btn.onRelease = function() {
previousSlideNode = currentSlideNode.previousSibling;
if (previousSlideNode == null) {
break;
} else {
currentIndex--;
currentSlideNode = previousSlideNode;
updateSlide(previousSlideNode);
}
};