Calculates the dimensions of the navigation controls
dojo.style(this.navNode, "position", "absolute"); //Place the navigation controls far off screen dojo.style(this.navNode, "top", "-10000px"); //Make the navigation controls visible dojo._setOpacity(this.navNode, 99); this.navPlay._size = dojo.marginBox(this.navPlay); this.navPrev._size = dojo.marginBox(this.navPrev); this.navNext._size = dojo.marginBox(this.navNext); dojo._setOpacity(this.navNode, 0); dojo.style(this.navNode, "position", ""); dojo.style(this.navNode, "top", "");