Ciao
Puoi mettere il codice dell'applet in un file .js
ES:
applet.js
<!--
with(document){
write('<applet code="" width="" height="">')
write('<param name="" value="">')
write('<param name="" value="">')
write('<param name="" value="">')
write('<param name="" value="">')
write('<param name="" value="">')
write('</applet>')
}
// -->
E richiamarla con:
<script language="javascript" src="applet.js"></scrpt>
Massimo