If nothing shows up below, try the following:

1. Download energy2d-applet.jar and energy2d.js to where this HTML file is located;
2. Make sure G:\Dropbox\Public\energy2dCharlesXie\natural-convection2.e2d is copied or moved to where this HTML file is located;
3. This applet may not work offline. You have to upload all the four files (energy2d-applet.jar, energy2d.js, natural-convection2.e2d, and this HTML file) to a web server and load this page after it is online.

This line of message should be removed if the applet works.