If you are using an external script try adding a querry and a number to the uri to fool the browser into thinking it is a new page... (
the same if the script is on the page)....
EG:
<script source="myJS.js
?2" ....
Or, in the addressbar:
http://myPage.html?2
And increment the number each time you make a change....
.....Willy
Edit: BTW, an additional benifit of using this method is that it allows you to quickly return/retrieve a previously cached change.... such as if you have made six changes and incremented the number for each change.... you can call up the previously cached second change by using it's index number behind the querry....