// remove the registerOverlay call to disable the controlbar
    hs.registerOverlay(
        {
            thumbnailId: null,
            overlayId: 'controlbar',
            position: 'top right',
            hideOnMouseOut: true
        }
    );
    hs.graphicsDir = 'highslide/graphics/';
    hs.outlineType = 'rounded-white';
    window.onload = function() {
        hs.preloadImages(5);
    }