function redimImage(img, max)
{
        setupZoom();
	var h=img.height;
	var w=img.width;
	if ((w > max) || (h > max)) {
		if (h > w) {
			var div = h / max;
			h = max;
			w /= div;
		}
		else {
			var div = w / max;
			w = max;
			h /= div;
		} 
	}
	img.height = h;
	img.width = w;
};