function switchImg(from,to){
                //swaps pre loaded image objects' src properties (used for rollovers)
        document[from].src = eval(to + ".src");
}

switchImageCount = 0;
SwitchImages = new Array();

function loadImg(imagenumber){
        document.switchImage.src = SwitchImages[imagenumber].src;
        switchImageCount=imagenumber;
}

function Next(){
        if (switchImageCount < SwitchImages.length - 1){
        switchImageCount = switchImageCount + 1;
        document.switchImage.src = SwitchImages[switchImageCount].src;
} else {
        switchImageCount = 0;
        document.switchImage.src = SwitchImages[switchImageCount].src;
        }
}

function Previous(){
        if (switchImageCount > 0){
        switchImageCount = switchImageCount - 1;
        document.switchImage.src = SwitchImages[switchImageCount].src;
} else {
        switchImageCount = SwitchImages.length - 1;
        document.switchImage.src = SwitchImages[switchImageCount].src;
        }
}