Event.observe(window, "load", ResizeImages);

var RESIZE_MAX_WIDTH = 200;

function ResizeImages()
{
	var images = $$("img");
	for (var i = 0; i < images.length; i += 1)
	{
		images[i].originalSize = images[i].getDimensions();
		if (images[i].originalSize.width >= RESIZE_MAX_WIDTH)
		{
			images[i].width = RESIZE_MAX_WIDTH;
			images[i].onclick = ExpandImage;
		}
	}
}

function ExpandImage()
{
	PopupShow(this.src, this.originalSize);
}