HTML and CSS Reference
Figure 12.16 Thumbnails of pictures in the image map for “Spring in San Francisco.”
If you resize a window and the image remains the same size, you might want to resize
the image as well so that it is proportional to the window; that is, as the window gets
bigger or smaller, so does the image. By using the onLoad event handler, each time the
page loads, a function will be called to reset the dimensions of the image, but to see the
change, you will have to refresh the page.