How can I make the jar files given in my applet's archive tag be stored on the client's machine and be used on reloading the same applet instead of reloading each time?
John Zukowski The Java Plug-in 1.3 supports caching. As shown on http://java.sun.com/products/plugin/appletcaching.html, you'll need to use PARAM NAME="cache_option" and PARAM NAME="cache_archive" in your tag describing the applet.
While waiting for people to upgrade to 1.3, you can look into using the Plug-in Version Control tool.
Another option is Java Web Start.